a(n) is a refactorable number and the sum of all refactorable numbers <= a(n) is also a refactorable number.
A235177
a(n) is a refactorable number and the sum of all refactorable numbers <= a(n) is also a refactorable number.
Terms
- a(0) =1a(1) =448a(2) =1384a(3) =1520a(4) =2216a(5) =2240a(6) =2264a(7) =2316a(8) =2432a(9) =2488a(10) =2536a(11) =2560a(12) =3280a(13) =3324a(14) =3384a(15) =3420a(16) =3464a(17) =3600a(18) =3712a(19) =3736a(20) =3924a(21) =12392a(22) =12560a(23) =12576a(24) =12664a(25) =12720a(26) =12756a(27) =12780a(28) =12828a(29) =12992
External references
- oeis: A235177