OFFSET
0,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
FORMULA
a(n) = ((n*(n+1))/2)^n. - Vincenzo Librandi, Sep 14 2011
EXAMPLE
a(3) = T(3)^3 = 6^3 = 216.
MAPLE
a:=n->mul(sum(j, j=1..n), k=1..n): seq(a(n), n=0..13); # Zerinvary Lajos, Jun 02 2007
MATHEMATICA
With[{rnn=Range[20]}, Join[{1}, First[#]^Last[#]&/@Thread[ {Accumulate[ rnn], rnn}]]] (* Harvey P. Dale, Dec 08 2013 *)
PROG
(PARI) a(n) = (n*(n+1)/2)^n; \\ Michel Marcus, Feb 19 2019
(Magma) [((n*(n+1))/2)^n: n in [0..20]]; // Vincenzo Librandi, Sep 14 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jon Perry, Jul 21 2003
EXTENSIONS
More terms from Ray Chandler, Nov 09 2003
STATUS
approved