47-gonal numbers.

Terms

a(0) =1a(1) =47a(2) =138a(3) =274a(4) =455a(5) =681a(6) =952a(7) =1268a(8) =1629a(9) =2035a(10) =2486a(11) =2982a(12) =3523a(13) =4109a(14) =4740a(15) =5416a(16) =6137a(17) =6903a(18) =7714a(19) =8570a(20) =9471a(21) =10417a(22) =11408a(23) =12444a(24) =13525a(25) =14651a(26) =15822a(27) =17038a(28) =18299a(29) =19605