A116554 a(2*n+1) = 7*a(n), a(2*n+2) = 8*a(n) + a(n-1).

1, 7, 8, 49, 57, 56, 71, 343, 400, 399, 505, 392, 505, 497, 624, 2401, 2815, 2800, 3543, 2793, 3592, 3535, 4439, 2744, 3641, 3535, 4432, 3479, 4481, 4368, 5489, 16807, 19832, 19705, 24921, 19600, 25215, 24801, 31144, 19551, 25887, 25144, 31529

Offset

0,2

Links

G. C. Greubel, Table of n, a(n) for n = 0..2500

Formula

From G. C. Greubel, Oct 30 2016: (Start)

a(2*n+1) = 7*a(n).

a(2*n+2) = 8*a(n) + a(n-1). (End)

Mathematica

b[0] := 0; b[1] := 1;
b[n_?EvenQ] := b[n] = 7*b[n/2];
b[n_?OddQ] := b[n] = 8*b[(n - 1)/2] + b[(n - 3)/2];
Table[b[n], {n, 1, 70}]

Crossrefs

Cf. A116528, A116529, A116552, A116553, A116555.

Sequence in context: A033044 A025630 A036566 * A038274 A201919 A249310

Adjacent sequences: A116551 A116552 A116553 * A116555 A116556 A116557

Keyword

nonn,easy

Author

Roger L. Bagula, Mar 15 2006

Extensions

Edited by N. J. A. Sloane, Fab 11 2007

New name using formula, Joerg Arndt, Dec 17 2022

Status

approved