A129027 Odd-indexed terms of A129026.

0, 108, 600, 1932, 4752, 9900, 18408, 31500, 50592, 77292, 113400, 160908, 222000, 299052, 394632, 511500, 652608, 821100, 1020312, 1253772, 1525200, 1838508, 2197800, 2607372, 3071712, 3595500, 4183608, 4841100, 5573232, 6385452, 7283400, 8272908

Offset

0,2

Links

Table of n, a(n) for n=0..31.

Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1).

Formula

a(n) = 4*(n*(5+13*n+7*n^2+2*n^3)). G.f.: -12*x*(x^3+x^2+5*x+9) / (x-1)^5. - Colin Barker, Jul 27 2013

Crossrefs

Sequence in context: A059436 A233685 A160919 * A288706 A204276 A202194

Adjacent sequences: A129024 A129025 A129026 * A129028 A129029 A129030

Keyword

nonn,easy

Author

N. J. A. Sloane, May 10 2007

Status

approved