A111454 a(n) = (n-4)^(n-3) - (n-3)^(n-4) + 1.

0, 0, 0, 18, 400, 7850, 162288, 3667650, 91171008, 2486784402, 74062575400, 2395420006034, 83695120256592, 3143661612445146, 126375169532421600, 5415486851106043650, 246486713303685957376

Offset: 4

Author

Robert J. Reid (greencroft57(AT)yahoo.co.uk), Nov 14 2005

Keywords

• nonn

Links

• Harvey P. Dale, Table of n, a(n) for n = 4..389

Crossrefs

Cf. A007925.

Programs

Mathematica

Table[(n-4)^(n-3)-(n-3)^(n-4)+1,{n,4,20}] (* Harvey P. Dale, Oct 05 2019 *)

Formula

a(n) = A007925(n-4) + 1. - Mathew Englander, Aug 14 2020

Extensions

More terms from R. J. Mathar, Feb 26 2008