A251595 - OEIS

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A251595

Distinct terms in A251416.

2, 3, 4, 5, 6, 7, 10, 11, 13, 17, 18, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

A251417(n) gives number of repetitions of a(n) in A251416;

a(n) = prime(n-4) for n > 11 according to Bradley Klee's conjecture, empirically confirmed for the first 10000 primes;

equivalently: A098551(a(n)) = A251239(n-4) for n > 11.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

EXAMPLE

. n | a(n) | A151417(n) | A098551(a(n))

. ----+--------------+------------+--------------

. 1 | 2 | 1 | 2

. 2 | 3 | 1 | 3

. 3 | 4 = 2*2 | 1 | 4

. 4 | 5 | 5 | 9

. 5 | 6 = 2*3 | 1 | 10

. 6 | 7 | 5 | 15

. 7 | 10 = 2*5 | 1 | 16

. 8 | 11 | 6 | 22

. 9 | 13 | 1 | 23

. 10 | 17 | 7 | 30

. 11 | 18 = 2*3*3 | 1 | 31

. 12 | 19 | 12 | 43

. 13 | 23 | 8 | 51

. 14 | 29 | 10 | 61

. 15 | 31 | 1 | 62

. 16 | 37 | 17 | 79

. 17 | 41 | 8 | 87

. 18 | 43 | 1 | 88

. 19 | 47 | 13 | 101

. 20 | 53 | 13 | 114

. 21 | 59 | 13 | 127

. 22 | 61 | 5 | 132

. 23 | 67 | 10 | 142

. 24 | 71 | 11 | 153

. 25 | 73 | 5 | 158

The last column gives the position of a(n) in A098550.

PROG

(Haskell)

import Data.List (group)

a251595 n = a251595_list !! (n-1)

a251595_list = map head $ group a251416_list

CROSSREFS

Cf. A098550, A098551, A251416, A251417, A251239.

Sequence in context: A001751 A191927 A116000 * A385901 A373789 A050725

Adjacent sequences: A251592 A251593 A251594 * A251596 A251597 A251598

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 05 2014

STATUS

approved