OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..300
FORMULA
a(n) = ((n+2)*(2n+7)^n + 1)/(n+3).
MATHEMATICA
Table[((n+2)(2n+7)^n+1)/(n+3), {n, 0, 20}] (* Harvey P. Dale, Nov 18 2021 *)
PROG
(Magma) [((n+2)*(2*n+7)^n+1)/(n+3): n in [0..20]]; // Vincenzo Librandi, Nov 12 2011
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Apr 23 2003
STATUS
approved