Numbers that eventually reach 1 under "x -> sum of 4th power of digits of x".

Terms

a(0) =1a(1) =10a(2) =100a(3) =1000a(4) =10000a(5) =11123a(6) =11132a(7) =11213a(8) =11231a(9) =11312a(10) =11321a(11) =12113a(12) =12131a(13) =12311a(14) =13112a(15) =13121a(16) =13211a(17) =21113a(18) =21131a(19) =21311a(20) =23111a(21) =31112a(22) =31121a(23) =31211a(24) =32111a(25) =44688a(26) =44868a(27) =44886a(28) =46488a(29) =46848