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A027296 a(n) = Sum_{k=0..floor((n-1)/2)} T(n,k) * T(n,k+2), with T given by A026022. 0
1, 6, 22, 100, 345, 1470, 5096, 21120, 74175, 302698, 1076922, 4352140, 15660827, 62876490, 228468272, 913093664, 3345466023, 13326904266, 49176362780, 195434713432, 725586231766, 2878605745972, 10744342665072, 42571577779200, 159638882959595, 631933882236306 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..27.

CROSSREFS

Cf. A026022.

Sequence in context: A240049 A078418 A100300 * A179601 A151495 A193463

Adjacent sequences: A027293 A027294 A027295 * A027297 A027298 A027299

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 26 2019

STATUS

approved

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Last modified March 24 04:28 EDT 2023. Contains 361454 sequences. (Running on oeis4.)