OFFSET
1,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..200
EXAMPLE
a(3)=T(3)^2-3!=6^2-6=36-6=30
MATHEMATICA
Table[((n(n+1))/2)^2-n!, {n, 30}] (* Harvey P. Dale, Nov 23 2011 *)
PROG
(PARI) t(n)=n*(n+1)/2 for(i=1, 50, print1(", "t(i)^2-i!))
CROSSREFS
KEYWORD
sign
AUTHOR
Jon Perry, Jun 08 2003
EXTENSIONS
Corrected by Harvey P. Dale, Nov 23 2011
STATUS
approved