A091905 Expansion of (1-4x)/((1+4x)(1-8x)).

1, 0, 32, 128, 1536, 10240, 90112, 688128, 5636096, 44564480, 358612992, 2860515328, 22917677056, 183207198720, 1466194460672, 11727408201728, 93827855548416, 750588484648960, 6004845316145152, 48038212773347328

Offset: 0

Author

Paul Barry, Feb 10 2004

Keywords

• easy
• nonn

Links

• Index entries for linear recurrences with constant coefficients, signature (4,32).

Formula

a(n)=8^n/3+2(-4)^n/3 = 32*A091904(n-1).

a(n) = 4^n*A078008(n). - R. J. Mathar, Mar 08 2021