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A027950 T(2n,n+2), T given by A027948. 1
1, 6, 63, 344, 1383, 4685, 14323, 41119, 113590, 306605, 816410, 2157046, 5674578, 14893364, 39040633, 102273950, 267839033, 701315739, 1836198205, 4807389285, 12586103720, 32951083211, 86267338468, 225851160284, 591286410708, 1548008385490 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Colin Barker, Table of n, a(n) for n = 2..1000

Index entries for linear recurrences with constant coefficients, signature (8,-26,45,-45,26,-8,1).

FORMULA

G.f.: x^2*(1-2*x+41*x^2-49*x^3+44*x^4-26*x^5+8*x^6-x^7)/((1-3*x+x^2)*(1-x)^5). - Ralf Stephan, Apr 24 2004

PROG

(PARI) Vec(x^2*(x^7-8*x^6+26*x^5-44*x^4+49*x^3-41*x^2+2*x-1)/((x-1)^5*(x^2-3*x+1)) + O(x^100)) \\ Colin Barker, Nov 19 2014

CROSSREFS

Bisection of A053739.

Sequence in context: A158987 A055005 A027811 * A184447 A053700 A296393

Adjacent sequences:  A027947 A027948 A027949 * A027951 A027952 A027953

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Colin Barker, Nov 19 2014

STATUS

approved

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Last modified June 15 22:19 EDT 2019. Contains 324145 sequences. (Running on oeis4.)