A028192 Expansion of 1/((1-5x)(1-8x)(1-9x)(1-12x)).

1, 34, 735, 12920, 201821, 2925054, 40302475, 535908340, 6945496041, 88331974874, 1107704935415, 13744775469360, 169190996868661, 2070039164549494, 25209912745227555, 305937712008039980

Offset

0,2

Links

Table of n, a(n) for n=0..15.

Index entries for linear recurrences with constant coefficients, signature (34,-421,2244,-4320).

Formula

a(n) = 21*a(n-1) - 108*a(n-2) + (8^(n+1) - 5^(n+1))/3, n >= 2. - Vincenzo Librandi, Mar 12 2011

a(n) = (7*8^(n+3) - 7*9^(n+3) + 12^(n+3) - 5^(n+3))/84. - Bruno Berselli, Mar 12 2011

Crossrefs

Sequence in context: A028207 A028193 A028206 * A028161 A028188 A295780

Adjacent sequences: A028189 A028190 A028191 * A028193 A028194 A028195

Keyword

nonn

Author

N. J. A. Sloane

Status

approved