A151782 a(1)=1; for n > 1, a(n)=8*7^{wt(n-1)-1}.

1, 8, 8, 56, 8, 56, 56, 392, 8, 56, 56, 392, 56, 392, 392, 2744, 8, 56, 56, 392, 56, 392, 392, 2744, 56, 392, 392, 2744, 392, 2744, 2744, 19208, 8, 56, 56, 392, 56, 392, 392, 2744, 56, 392, 392, 2744, 392, 2744, 2744, 19208, 56, 392, 392, 2744, 392, 2744, 2744, 19208, 392

Offset

1,2

Links

Paolo Xausa, Table of n, a(n) for n = 1..10000

Mathematica

Join[{1}, 8*7^(DigitSum[Range[100], 2] - 1)] (* Paolo Xausa, Feb 18 2026 *)

Crossrefs

Cf. A151779, A151780, etc.

Sequence in context: A241867 A243124 A103744 * A165829 A358714 A164683

Adjacent sequences: A151779 A151780 A151781 * A151783 A151784 A151785

Keyword

nonn

Author

N. J. A. Sloane, Jun 25 2009

Status

approved