A239965 Where the n-th nonprime occurs in the nonprime EKG sequence A240024.

1, 2, 3, 4, 7, 5, 6, 10, 8, 11, 9, 12, 15, 13, 14, 18, 21, 16, 20, 17, 22, 25, 23, 19, 24, 28, 26, 29, 27, 30, 33, 31, 32, 43, 34, 37, 35, 36, 40, 44, 38, 45, 39, 46, 49, 47, 41, 48, 52, 50, 42, 51, 53, 56, 54, 60, 55, 57, 64, 58, 59, 74, 62, 65, 61, 63, 71

Offset

1,2

Comments

A240024(a(n)) = A018252(n);

a permutation of the natural numbers with inverse A238862: a(A238862(n))=A238862(a(n))=n.

Links

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

Index entries for sequences that are permutations of the natural numbers

Prog

(Haskell)
import Data.List (elemIndex); import Data.Maybe (fromJust)
a239965 = (+ 1) . fromJust . (`elemIndex` a240024_list) . a018252

Crossrefs

Cf. A239943 (fixed points).

Sequence in context: A359051 A014321 A175343 * A072767 A071651 A072658

Adjacent sequences: A239962 A239963 A239964 * A239966 A239967 A239968

Keyword

nonn

Author

Reinhard Zumkeller, Apr 30 2014

Status

approved