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A027969 T(n,2n-7), T given by A027960. 2
3, 7, 18, 47, 120, 291, 661, 1404, 2801, 5283, 9484, 16305, 26990, 43215, 67191, 101782, 150639, 218351, 310614, 434419, 598260, 812363, 1088937, 1442448, 1889917, 2451243, 3149552, 4011573, 5068042, 6354135, 7909931 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

LINKS

Table of n, a(n) for n=4..34.

FORMULA

G.f.: [x^4*(3-2x)*(1-x+x^2)*(1-4x+7x^2-4x^3+x^4)]/(1-x)^8. Differences of A027970. - Ralf Stephan, Feb 07 2004

CROSSREFS

A column of triangle A027011.

Sequence in context: A094297 A026107 A173765 * A027971 A219233 A211276

Adjacent sequences:  A027966 A027967 A027968 * A027970 A027971 A027972

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 18 00:19 EST 2019. Contains 320237 sequences. (Running on oeis4.)