OFFSET
0,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
FORMULA
a(n) = ((n+3)^(n+1)-(-(n+2))^(n+1))/(2*n+5).
MATHEMATICA
Table[((n + 3)^(n + 1) - (-(n + 2))^(n + 1)) / (2 n + 5), {n, 0, 20}] (* Vincenzo Librandi, Aug 08 2013 *)
PROG
(Magma) [((n+3)^(n+1)-(-(n+2))^(n+1))/(2*n+5): n in [0..20]]; // Vincenzo Librandi, Aug 08 2013
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Mar 17 2003
STATUS
approved