A340498 Where 2^n appears in A340488 for the first time.

3, 6, 16, 56, 216, 856, 3416, 13656, 54616, 218456, 873816, 3495256, 13981016, 55924056, 223696216, 894784856, 3579139416, 14316557656, 57266230616, 229064922456, 916259689816

Offset

0,1

Comments

A subsequence of A340494 and A340497. Note that A340494 has a conjectured g.f.

Links

Table of n, a(n) for n=0..20.

Rémy Sigrist, C program for A340498

Prog

(C) See Links section.

Crossrefs

Cf. A340488, A340494-A340497.

Sequence in context: A274294 A201969 A367639 * A288850 A185629 A107885

Adjacent sequences: A340495 A340496 A340497 * A340499 A340500 A340501

Keyword

nonn,more

Author

N. J. A. Sloane, Jan 11 2021

Extensions

a(8)-a(20) from Rémy Sigrist, Jan 11 2021

Status

approved