Number of symmetric 5 X 5 matrices of nonnegative integers with zeros on the main diagonal and every row and column adding to n.

A244868

Number of symmetric 5 X 5 matrices of nonnegative integers with zeros on the main diagonal and every row and column adding to n.

Terms

    a(0) =1a(1) =22a(2) =158a(3) =654a(4) =1980a(5) =4906a(6) =10577a(7) =20588a(8) =37059a(9) =62710a(10) =100936a(11) =155882a(12) =232518a(13) =336714a(14) =475315a(15) =656216a(16) =888437a(17) =1182198a(18) =1548994a(19) =2001670a(20) =2554496a(21) =3223242a(22) =4025253a(23) =4979524a(24) =6106775a(25) =7429526a(26) =8972172a(27) =10761058a(28) =12824554a(29) =15193130

External references