36-gonal numbers: a(n) = n*(17*n-16).

Terms

a(0) =0a(1) =1a(2) =36a(3) =105a(4) =208a(5) =345a(6) =516a(7) =721a(8) =960a(9) =1233a(10) =1540a(11) =1881a(12) =2256a(13) =2665a(14) =3108a(15) =3585a(16) =4096a(17) =4641a(18) =5220a(19) =5833a(20) =6480a(21) =7161a(22) =7876a(23) =8625a(24) =9408a(25) =10225a(26) =11076a(27) =11961a(28) =12880a(29) =13833