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A116554 Anti-Harborth alternating chaotic sequence, 5th type. 6
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

H. Harborth, Number of Odd Binomial Coefficients, Proc. Amer. Math. Soc. 62, 19-22, 1977.

Eric Weisstein's World of Mathematics, Stolarsky-Harborth Constant

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]; a = 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,obsc

AUTHOR

Roger L. Bagula, Mar 15 2006

EXTENSIONS

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

Name changed by G. C. Greubel, Oct 30 2016

STATUS

approved

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Last modified December 15 09:53 EST 2018. Contains 318148 sequences. (Running on oeis4.)