login
A081298
Main diagonal of the square array A081297.
6
1, 1, 7, 25, 461, 2821, 84883, 734161, 30684601, 342800821, 18348174791, 251203133545, 16394732478853, 265727053328101, 20464206411678331, 383172119935376161, 34011762638354230001, 722380674949394645269
OFFSET
0,3
LINKS
FORMULA
a(n) = ((n+1)^(n+1)-(-n)^(n+1))/(2n+1).
MATHEMATICA
Table[((n + 1)^(n + 1) - (-n)^(n + 1)) / (2 n + 1), {n, 0, 20}] (* Vincenzo Librandi, Aug 07 2013 *)
PROG
(Magma) [((n+1)^(n+1)-(-n)^(n+1))/(2*n+1): n in [0..20]]; // Vincenzo Librandi, Aug 07 2013
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Mar 17 2003
STATUS
approved