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A187894 Numerators of expansion of sqrt(F-1) where F is the g.f. for A000957. 0
0, 1, 1, 5, 13, 151, 463, 2957, 9725, 261739, 896507, 6231571, 21920539, 311583955, 1116869179, 8066939069, 29323723037, 1715310801971, 6303146700755, 46534580965463, 172479371522639, 2566609537700489, 9580228898547889, 71737644622567835, 269340391562396747, 8110742483462690623, 30602551916179033519 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

The denominators are powers of 2.

REFERENCES

L. W. Shapiro and C. J. Wang, Generating identities via 2 X 2 matrices, Congressus Numerantium, 205 (2010), 33-46.

LINKS

Table of n, a(n) for n=0..26.

EXAMPLE

0, 1, 1, 5/2, 13/2, 151/8, 463/8, 2957/16, 9725/16, 261739/128, 896507/128,  ...

CROSSREFS

Cf. A000957.

Sequence in context: A316919 A099974 A247820 * A214591 A159261 A117077

Adjacent sequences:  A187891 A187892 A187893 * A187895 A187896 A187897

KEYWORD

nonn,frac

AUTHOR

N. J. A. Sloane, Mar 15 2011

STATUS

approved

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Last modified November 16 02:33 EST 2018. Contains 317252 sequences. (Running on oeis4.)