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A113281 Self-convolution equals A113224. 4
1, 1, 3, 5, 11, 23, 51, 113, 255, 579, 1325, 3047, 7039, 16319, 37951, 88489, 206799, 484255, 1135969, 2668951, 6279509, 14793169, 34889553, 82372723, 194664283, 460436551, 1089943229, 2582033519, 6120967411, 14519686915, 34463104999 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Convolution of bisections A113283 and A113284 yields A082639, which is a bisection of the self-convolution of this sequence. Terms of the logarithmic derivative A113282 are related to the self-convolution A113224 by: A113282(2*n) = A113224(2*n), A113282(4*n+1) = 3 + A113224(4*n+1), A113282(4*n+3) = 1 + A113224(4*n+3).

LINKS

Table of n, a(n) for n=0..30.

FORMULA

G.f.: A(x) = ( (1+x^2)/(1-x^2)/(1-2*x-x^2) )^(1/2).

CROSSREFS

Cf. A113282, A113283, A113284.

Sequence in context: A084361 A077229 A018113 * A037446 A113151 A269964

Adjacent sequences:  A113278 A113279 A113280 * A113282 A113283 A113284

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Oct 22 2005

STATUS

approved

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Last modified March 25 08:15 EDT 2019. Contains 321469 sequences. (Running on oeis4.)