OFFSET
3,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 3..80
FORMULA
a(n) = n * binomial(n-1, 2) * 2^binomial(n-1, 2).
a(n) = n * A103904(n-1) for n >= 3. - Andrew Howroyd, Nov 23 2020
MATHEMATICA
Table[n*Binomial[n-1, 2]*2^Binomial[n-1, 2], {n, 3, 20}] (* Vaclav Kotesovec, Mar 29 2014 *)
PROG
(Magma) [n*Binomial(n-1, 2)*2^Binomial(n-1, 2): n in [3..20]]; // Vincenzo Librandi, Mar 29 2014
(PARI) a(n) = {n * binomial(n-1, 2) * 2^binomial(n-1, 2)} \\ Andrew Howroyd, Nov 23 2020
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Christian G. Bower, Jan 04 1999
STATUS
approved