Numbers not of the form a^2 + b^3 + c^4 + d^5 for a,b,c,d >= 0.

Terms

a(0) =15a(1) =23a(2) =55a(3) =62a(4) =71a(5) =471a(6) =478a(7) =510a(8) =646a(9) =806a(10) =839a(11) =879a(12) =939a(13) =1023a(14) =1063a(15) =1287a(16) =2127a(17) =5135a(18) =6811a(19) =7499a(20) =9191a(21) =26471