House numbers: a(n) = (n+1)^3 + Sum_{i=1..n} i^2.

Terms

a(0) =1a(1) =9a(2) =32a(3) =78a(4) =155a(5) =271a(6) =434a(7) =652a(8) =933a(9) =1285a(10) =1716a(11) =2234a(12) =2847a(13) =3563a(14) =4390a(15) =5336a(16) =6409a(17) =7617a(18) =8968a(19) =10470a(20) =12131a(21) =13959a(22) =15962a(23) =18148a(24) =20525a(25) =23101a(26) =25884a(27) =28882a(28) =32103a(29) =35555