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A181658 Row sums of A181657. 1
1, 2, 3, 7, 8, 19, 20, 48, 49, 118, 119, 287, 288, 695, 696, 1680, 1681, 4058, 4059, 9799, 9800, 23659, 23660, 57120, 57121, 137902, 137903, 332927, 332928, 803759, 803760, 1940448, 1940449, 4684658, 4684659, 11309767, 11309768, 27304195, 27304196 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..38.

Index entries for linear recurrences with constant coefficients, signature (0,3,0,-1,0,-1)

FORMULA

G.f.: (1+2x+x^3)/(1-3x^2+x^4+x^6)=(1+2x+x^3)/((1-x^2)(1-2x^2-x^4)).

CROSSREFS

Cf. A048739 (bisection).

Sequence in context: A002964 A166966 A247843 * A251541 A276032 A114281

Adjacent sequences:  A181655 A181656 A181657 * A181659 A181660 A181661

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Nov 03 2010

STATUS

approved

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Last modified March 26 04:32 EDT 2019. Contains 321481 sequences. (Running on oeis4.)