29-gonal pyramidal numbers: a(n) = n*(n+1)*(9*n-8)/2.

Terms

a(0) =0a(1) =1a(2) =30a(3) =114a(4) =280a(5) =555a(6) =966a(7) =1540a(8) =2304a(9) =3285a(10) =4510a(11) =6006a(12) =7800a(13) =9919a(14) =12390a(15) =15240a(16) =18496a(17) =22185a(18) =26334a(19) =30970a(20) =36120a(21) =41811a(22) =48070a(23) =54924a(24) =62400a(25) =70525a(26) =79326a(27) =88830a(28) =99064a(29) =110055