Octo numbers (a polygonal sequence): a(n) = 5*n^2 - 6*n + 2 = (n-1)^2 + (2*n-1)^2.

Terms

a(0) =1a(1) =10a(2) =29a(3) =58a(4) =97a(5) =146a(6) =205a(7) =274a(8) =353a(9) =442a(10) =541a(11) =650a(12) =769a(13) =898a(14) =1037a(15) =1186a(16) =1345a(17) =1514a(18) =1693a(19) =1882a(20) =2081a(21) =2290a(22) =2509a(23) =2738a(24) =2977a(25) =3226a(26) =3485a(27) =3754a(28) =4033a(29) =4322