Number of strings of numbers x(i=1..7) in 0..n with sum i^2*x(i) equal to n*49.

Terms

a(0) =2a(1) =10a(2) =61a(3) =219a(4) =656a(5) =1613a(6) =3539a(7) =7099a(8) =13225a(9) =23247a(10) =38938a(11) =62599a(12) =97177a(13) =146396a(14) =214841a(15) =308110a(16) =432893a(17) =597226a(18) =810560a(19) =1083958a(20) =1430179a(21) =1864028a(22) =2402453a(23) =3064671a(24) =3872421a(25) =4850307a(26) =6025900a(27) =7429899a(28) =9096446a(29) =11063531