A013797 a(n) = 12^(4*n + 3).

1728, 35831808, 743008370688, 15407021574586368, 319479999370622926848, 6624737266949237011120128, 137370551967459378662586974208, 2848515765597237675947403497177088, 59066822915424320448445358917464096768

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..200
• Tanya Khovanova, Recursive Sequences
• Index entries for linear recurrences with constant coefficients, signature (20736).

Crossrefs

Subsequence of A001021.

Programs

Magma

[12^(4*n+3): n in [0..10]]; // Vincenzo Librandi, Jun 28 2011

Mathematica

12^(4*Range[0,20]+3) (* or *) NestList[20736#&,1728,20] (* Harvey P. Dale, Apr 29 2012 *)

Formula

a(n) = 20736*a(n-1); a(0) = 1728. - Harvey P. Dale, Apr 29 2012