Number of 4 X 4 matrices with nonnegative integer entries and all row sums equal to n, up to row and column permutation.
A058390
Number of 4 X 4 matrices with nonnegative integer entries and all row sums equal to n, up to row and column permutation.
Terms
- a(0) =1a(1) =5a(2) =53a(3) =458a(4) =3411a(5) =19865a(6) =95214a(7) =383714a(8) =1346183a(9) =4202086a(10) =11905966a(11) =31061806a(12) =75533056a(13) =172800689a(14) =374861365a(15) =775978710a(16) =1541027694a(17) =2949003213a(18) =5458806804a(19) =9805626744a(20) =17140511056
External references
- oeis: A058390