Integers of the form (x^3)/6 + (x^2)/2 + x + 1.

Terms

a(0) =1a(1) =13a(2) =61a(3) =172a(4) =373a(5) =691a(6) =1153a(7) =1786a(8) =2617a(9) =3673a(10) =4981a(11) =6568a(12) =8461a(13) =10687a(14) =13273a(15) =16246a(16) =19633a(17) =23461a(18) =27757a(19) =32548a(20) =37861a(21) =43723a(22) =50161a(23) =57202a(24) =64873a(25) =73201a(26) =82213a(27) =91936a(28) =102397a(29) =113623