Number of nonnegative integer 6 X 6 matrices with sum of elements equal to n, under row and column permutations.

A052372

Number of nonnegative integer 6 X 6 matrices with sum of elements equal to n, under row and column permutations.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =10a(4) =33a(5) =91a(6) =298a(7) =881a(8) =2825a(9) =8791a(10) =27947a(11) =87410a(12) =272991a(13) =837370a(14) =2532012a(15) =7496030a(16) =21735743a(17) =61570427a(18) =170399621a(19) =460413115a(20) =1214983434a(21) =3131870712a(22) =7890604652a(23) =19441462894a(24) =46878788710a(25) =110702854983a(26) =256217556777

External references