30-gonal pyramidal numbers: a(n) = n*(n+1)*(28*n-25)/6.

Terms

a(0) =0a(1) =1a(2) =31a(3) =118a(4) =290a(5) =575a(6) =1001a(7) =1596a(8) =2388a(9) =3405a(10) =4675a(11) =6226a(12) =8086a(13) =10283a(14) =12845a(15) =15800a(16) =19176a(17) =23001a(18) =27303a(19) =32110a(20) =37450a(21) =43351a(22) =49841a(23) =56948a(24) =64700a(25) =73125a(26) =82251a(27) =92106a(28) =102718a(29) =114115