Number of positive integer matrices with entries summing to n, with equal row-sums and equal column-sums.

A323349

Number of positive integer matrices with entries summing to n, with equal row-sums and equal column-sums.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =3a(4) =6a(5) =3a(6) =11a(7) =3a(8) =12a(9) =6a(10) =13a(11) =3a(12) =52a(13) =3a(14) =15a(15) =30a(16) =57a(17) =3a(18) =156a(19) =3a(20) =238a(21) =129a(22) =19a(23) =3a(24) =2221a(25) =6a(26) =21a(27) =415a(28) =3114a(29) =3

External references