Centered 24-gonal numbers.

Terms

a(0) =1a(1) =25a(2) =73a(3) =145a(4) =241a(5) =361a(6) =505a(7) =673a(8) =865a(9) =1081a(10) =1321a(11) =1585a(12) =1873a(13) =2185a(14) =2521a(15) =2881a(16) =3265a(17) =3673a(18) =4105a(19) =4561a(20) =5041a(21) =5545a(22) =6073a(23) =6625a(24) =7201a(25) =7801a(26) =8425a(27) =9073a(28) =9745a(29) =10441