29-gonal numbers: a(n) = n*(27*n-25)/2.

Terms

a(0) =0a(1) =1a(2) =29a(3) =84a(4) =166a(5) =275a(6) =411a(7) =574a(8) =764a(9) =981a(10) =1225a(11) =1496a(12) =1794a(13) =2119a(14) =2471a(15) =2850a(16) =3256a(17) =3689a(18) =4149a(19) =4636a(20) =5150a(21) =5691a(22) =6259a(23) =6854a(24) =7476a(25) =8125a(26) =8801a(27) =9504a(28) =10234a(29) =10991