OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..100
FORMULA
a(n) ~ binomial(n^2, n).
MATHEMATICA
Table[Sum[Binomial[k*n, k], {k, 0, n}], {n, 0, 20}]
PROG
(Maxima) A226391(n):=sum(binomial(k*n, k), k, 0, n); makelist(A226391(n), n, 0, 30); /* Martin Ettl, Jun 06 2013 */
(Magma) [(&+[Binomial(n*j, j): j in [0..n]]): n in [0..30]]; // G. C. Greubel, Aug 31 2022
(SageMath)
@CachedFunction
def A226391(n): return sum(binomial(n*j, j) for j in (0..n))
[A226391(n) for n in (0..30)] # G. C. Greubel, Aug 31 2022
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Jun 06 2013
STATUS
approved