Number of non-isomorphic 5 X 5 nonnegative integer matrices with all row and column sums equal to n up to permutations of rows and columns.
A333735
Number of non-isomorphic 5 X 5 nonnegative integer matrices with all row and column sums equal to n up to permutations of rows and columns.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =31a(4) =264a(5) =1856a(6) =12703a(7) =71457a(8) =348622a(9) =1477513a(10) =5584477a(11) =19071063a(12) =59748789a(13) =173510124a(14) =471615249a(15) =1208756261a(16) =2940705168a(17) =6827326093a(18) =15197942364a(19) =32566376769a(20) =67408927586a(21) =135184087822a(22) =263356043520a(23) =499542801451a(24) =924501767285
External references
- oeis: A333735