A262510 Parent nodes of nonzero terms of A262509: a(n) = A049820(A262509(n)).

119139, 119143, 119147, 119213, 119225, 119919, 119921, 120073, 120091, 120095, 120097, 120277, 120291, 120347, 120391, 120703, 120739, 120883, 120891, 120895, 120915, 120917, 121435, 121543, 121819, 122075, 122257, 122261, 122271, 122273, 122809, 122953, 123197, 123205, 123219, 123231, 123251, 123749, 24660527, 24660543, 24662309, 24662321, 24663755, 24664989, 24665019, 24665347, 24665929, 24665977, 24669139, 24669833

Offset: 1

Author

Antti Karttunen, Sep 25 2015

Keywords

• nonn

Comments

These numbers are one step nearer (than those of A262509) to the root (zero) of the tree where the parent-child relation is given by A049820(child) = parent. Like the terms of A262509, they are also vertices in the infinite trunk of that tree. Cf. A259934.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..68

Crossrefs

Cf. A049820, A262508, A262509.

Subsequence of A259934 and A262511.

Also a subsequence of A262517 (provided all terms are odd).

Programs

Scheme

(define (A262510 n) (A049820 (A262509 n)))

Formula

a(n) = A049820(A262509(n)).

a(n) = A259934(A262508(n)-1).