Number of nonnegative integer 7 X 7 matrices with sum of elements equal to n, under row and column permutations.

A052373

Number of nonnegative integer 7 X 7 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) =910a(8) =2974a(9) =9655a(10) =32287a(11) =108274a(12) =367489a(13) =1246921a(14) =4229171a(15) =14246120a(16) =47542245a(17) =156588539a(18) =507914513a(19) =1618965097a(20) =5064384168a(21) =15531406244a(22) =46670874679a(23) =137372332583a(24) =396053582039

External references