Starhex honeycomb numbers: a(n) = 13 + 60*n + 60*n^2.

Terms

a(0) =13a(1) =133a(2) =373a(3) =733a(4) =1213a(5) =1813a(6) =2533a(7) =3373a(8) =4333a(9) =5413a(10) =6613a(11) =7933a(12) =9373a(13) =10933a(14) =12613a(15) =14413a(16) =16333a(17) =18373a(18) =20533a(19) =22813a(20) =25213a(21) =27733a(22) =30373a(23) =33133a(24) =36013a(25) =39013a(26) =42133a(27) =45373a(28) =48733a(29) =52213