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A131910 Central terms of triangle A131909. 1
1, 1, 3, 8, 26, 79, 274, 964, 3496, 12664, 46157, 168240, 615173, 2256669, 8321911, 30871862, 115280183, 433247309, 1638036186, 6225871432, 23769249188, 91077899373, 350002189936, 1348065993111, 5201249282212, 20094668668700 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..25.

FORMULA

a(n) = A131909(2n,n) for n>=0.

PROG

(PARI)

CROSSREFS

Cf. A131909.

Sequence in context: A317852 A306485 A148801 * A205775 A331320 A148802

Adjacent sequences:  A131907 A131908 A131909 * A131911 A131912 A131913

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Jul 26 2007

STATUS

approved

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Last modified May 27 22:39 EDT 2022. Contains 354110 sequences. (Running on oeis4.)