A235177 a(n) is a refactorable number and the sum of all refactorable numbers <= a(n) is also a refactorable number.

1, 448, 1384, 1520, 2216, 2240, 2264, 2316, 2432, 2488, 2536, 2560, 3280, 3324, 3384, 3420, 3464, 3600, 3712, 3736, 3924, 12392, 12560, 12576, 12664, 12720, 12756, 12780, 12828, 12992, 13044, 13116, 17360, 17432, 18072, 18108, 18336, 18368, 18636, 18664

Offset

1,2

Links

Giovanni Resta, Table of n, a(n) for n = 1..1000

Example

The sum of the terms of A033950 <= 448 equals 9120, which is A033950(616).

Crossrefs

Cf. A033950, A235176.

Sequence in context: A062040 A093786 A251646 * A346514 A194648 A348344

Adjacent sequences: A235174 A235175 A235176 * A235178 A235179 A235180

Keyword

nonn

Author

Ivan N. Ianakiev, Jan 04 2014

Extensions

a(8)-a(40) from Giovanni Resta, Jan 04 2014

Status

approved