Sum of numbers in the n-th antidiagonal of the reciprocity array of 0.

Terms

a(0) =0a(1) =1a(2) =4a(3) =11a(4) =22a(5) =42a(6) =66a(7) =104a(8) =150a(9) =211a(10) =280a(11) =377a(12) =474a(13) =604a(14) =750a(15) =916a(16) =1096a(17) =1323a(18) =1548a(19) =1831a(20) =2122a(21) =2446a(22) =2794a(23) =3212a(24) =3620a(25) =4087a(26) =4590a(27) =5141a(28) =5698a(29) =6360