45-gonal numbers: n*(43*n-41)/2.

Terms

a(0) =1a(1) =45a(2) =132a(3) =262a(4) =435a(5) =651a(6) =910a(7) =1212a(8) =1557a(9) =1945a(10) =2376a(11) =2850a(12) =3367a(13) =3927a(14) =4530a(15) =5176a(16) =5865a(17) =6597a(18) =7372a(19) =8190a(20) =9051a(21) =9955a(22) =10902a(23) =11892a(24) =12925a(25) =14001a(26) =15120a(27) =16282a(28) =17487a(29) =18735