Largest number that is not the sum of four (2n+1)-gonal numbers.

Terms

a(0) =0a(1) =89a(2) =1003a(3) =2894a(4) =4765a(5) =6906a(6) =14057a(7) =22296a(8) =34913a(9) =51301a(10) =60551a(11) =72335a(12) =100206a(13) =123097a(14) =148830a(15) =184931a(16) =244253a(17) =273883a(18) =291741a(19) =332935a(20) =405859a(21) =490767a(22) =546709a(23) =749357a(24) =672419a(25) =826463a(26) =849211a(27) =1009749a(28) =988071a(29) =1128245