OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
FORMULA
a(n) = 1 + floor( n*(n+9)*(n^2 +9*n +38)/360 ).
a(n) = floor(binomial(n+6,4)/15). - G. C. Greubel, Mar 24 2023
MATHEMATICA
Table[Floor[n*(n+9)*(n^2+9*n+38)/360] +1, {n, 0, 50}] (* Vincenzo Librandi, Aug 02 2013 *)
Floor[Binomial[Range[6, 76], 4]/15] (* G. C. Greubel, Mar 24 2023 *)
PROG
(Magma) [Floor(n*(n+9)*(n^2+9*n+38)/360)+1: n in [0..50]]; // Vincenzo Librandi, Aug 02 2013
(SageMath) [binomial(n+6, 4)//15 for n in range(71)] # G. C. Greubel, Mar 24 2023
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paul Barry, Jun 01 2003
STATUS
approved