A135314 a(n) = 7^n*6^(n^2).

1, 42, 63504, 3456649728, 6773484887801856, 477827850919028491026432, 1213481763117613016471583634489344, 110942398014527364799038852663129544775958528

Offset

0,2

Comments

Hankel transform of A130978.

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..25

Formula

a(n) = 7^n*6^(n^2) = A000420(n)*A076781(n).

Mathematica

Table[7^n 6^(n^2), {n, 0, 10}] (* Harvey P. Dale, Sep 06 2015 *)

Prog

(Magma)[7^n*6^(n^2): n in [0..10]]; // Vincenzo Librandi, May 30 2011

Crossrefs

Sequence in context: A299503 A159433 A368023 * A135425 A028669 A348820

Adjacent sequences: A135311 A135312 A135313 * A135315 A135316 A135317

Keyword

nonn

Author

Philippe Deléham, Dec 05 2007

Status

approved