Number of 7 X 7 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.

A156392

Number of 7 X 7 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.

Terms

    a(0) =1a(1) =20a(2) =132a(3) =294a(4) =440a(5) =270a(6) =1414a(7) =635a(8) =1716a(9) =2096a(10) =5108a(11) =9108a(12) =3066a(13) =3096a(14) =9216a(15) =2952a(16) =9131a(17) =8172a(18) =21624a(19) =39000a(20) =31638a(21) =11364a(22) =31206a(23) =14100a(24) =32236a(25) =18704a(26) =64560a(27) =102762a(28) =51947a(29) =50136

External references