Centered 28-gonal numbers.

Terms

a(0) =1a(1) =29a(2) =85a(3) =169a(4) =281a(5) =421a(6) =589a(7) =785a(8) =1009a(9) =1261a(10) =1541a(11) =1849a(12) =2185a(13) =2549a(14) =2941a(15) =3361a(16) =3809a(17) =4285a(18) =4789a(19) =5321a(20) =5881a(21) =6469a(22) =7085a(23) =7729a(24) =8401a(25) =9101a(26) =9829a(27) =10585a(28) =11369a(29) =12181