Partial sums of A092181.

Terms

a(0) =1a(1) =25a(2) =178a(3) =722a(4) =2147a(5) =5243a(6) =11172a(7) =21540a(8) =38469a(9) =64669a(10) =103510a(11) =159094a(12) =236327a(13) =340991a(14) =479816a(15) =660552a(16) =892041a(17) =1184289a(18) =1548538a(19) =1997338a(20) =2544619a(21) =3205763a(22) =3997676a(23) =4938860a(24) =6049485a(25) =7351461a(26) =8868510a(27) =10626238a(28) =12652207a(29) =14976007