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A026157 a(n) = T(2n,n), where T is the array in A026148. 0
1, 1, 7, 35, 189, 1038, 5796, 32734, 186494, 1069793, 6170554, 35752906, 207940493, 1213271620, 7098581115, 41631465591, 244669507994, 1440588095878, 8495970243502, 50179297862166, 296763850899633 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..20.

CROSSREFS

Sequence in context: A295248 A295647 A026128 * A025184 A267712 A263513

Adjacent sequences:  A026154 A026155 A026156 * A026158 A026159 A026160

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 15 12:47 EST 2021. Contains 340187 sequences. (Running on oeis4.)