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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
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)).
MATHEMATICA
CoefficientList[Series[(1+2x+x^3)/(1-3x^2+x^4+x^6), {x, 0, 40}], x] (* or *) LinearRecurrence[{0, 3, 0, -1, 0, -1}, {1, 2, 3, 7, 8, 19}, 40] (* Harvey P. Dale, Mar 29 2022 *)
CROSSREFS
Cf. A048739 (bisection).
Sequence in context: A002964 A166966 A247843 * A251541 A325105 A276032
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Nov 03 2010
STATUS
approved

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Last modified February 25 00:32 EST 2024. Contains 370308 sequences. (Running on oeis4.)