75-gonal numbers: a(n) = n*(73*n-71)/2.

Terms

a(0) =0a(1) =1a(2) =75a(3) =222a(4) =442a(5) =735a(6) =1101a(7) =1540a(8) =2052a(9) =2637a(10) =3295a(11) =4026a(12) =4830a(13) =5707a(14) =6657a(15) =7680a(16) =8776a(17) =9945a(18) =11187a(19) =12502a(20) =13890a(21) =15351a(22) =16885a(23) =18492a(24) =20172a(25) =21925a(26) =23751a(27) =25650a(28) =27622a(29) =29667