Composite numbers with four prime factors (not necessarily distinct) whose concatenation yields a palindrome.
A046453
Composite numbers with four prime factors (not necessarily distinct) whose concatenation yields a palindrome.
Terms
- a(0) =16a(1) =81a(2) =625a(3) =2401a(4) =3975a(5) =4719a(6) =5565a(7) =6591a(8) =8745a(9) =10731a(10) =14399a(11) =14641a(12) =16863a(13) =20111a(14) =34391a(15) =36501a(16) =39963a(17) =41019a(18) =46179a(19) =47229a(20) =48231a(21) =60813a(22) =61761a(23) =62991a(24) =69027a(25) =109179a(26) =113631a(27) =116475a(28) =143991a(29) =158985
External references
- oeis: A046453