Number of 4 X n nonnegative integer matrices with all column sums 4, up to row and column permutation.
A058410
Number of 4 X n nonnegative integer matrices with all column sums 4, up to row and column permutation.
Terms
- a(0) =1a(1) =5a(2) =45a(3) =407a(4) =3411a(5) =25142a(6) =163711a(7) =947909a(8) =4949257a(9) =23579022a(10) =103592423a(11) =423435205a(12) =1622413728a(13) =5864055622a(14) =20102107500a(15) =65660463140a(16) =205176581382a(17) =615506305973
External references
- oeis: A058410