a(n) = the least integer that is centered polygonal in exactly n ways.

Terms

a(0) =4a(1) =7a(2) =37a(3) =31a(4) =91a(5) =181a(6) =211a(7) =421a(8) =631a(9) =1891a(10) =1261a(11) =2521a(12) =6931a(13) =18481a(14) =20791a(15) =13861a(16) =27721a(17) =41581a(18) =83161a(19) =138601a(20) =245701a(21) =235621a(22) =180181a(23) =556921a(24) =360361a(25) =540541a(26) =1670761a(27) =1081081a(28) =1413721a(29) =2702701