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A027938 a(n) = T(2n,n+2), T given by A027935. 0
1, 16, 92, 365, 1204, 3588, 10093, 27476, 73440, 194345, 511576, 1342936, 3520457, 9222440, 24151764, 63238773, 165571628, 433484476, 1134891605, 2971201740, 7778726776 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..22.

FORMULA

Empirical g.f.: x^2*(1+9*x-x^2-x^3) / ((1-x)^4*(1-3*x+x^2)). - Colin Barker, Dec 10 2015

CROSSREFS

Sequence in context: A050406 A047674 A153029 * A185458 A108676 A294433

Adjacent sequences:  A027935 A027936 A027937 * A027939 A027940 A027941

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 23 18:54 EST 2018. Contains 299586 sequences. (Running on oeis4.)