A118128 Numbers n such that the sum of the first n odd composites is palindromic in base 2.

1, 3, 7, 19, 137, 139, 155, 379, 1509, 4877, 9509, 13015, 44819, 75595, 245027, 804463, 1082053, 1154293, 5802669, 10186839, 52333761, 81509017, 130656729, 375417331, 476594459, 1955429145, 9051994251, 12788782787

Offset: 1

Author

Ryan Propper, May 12 2006

Keywords

• nonn
• base

Examples

			The sum of the first 19 odd composites, when written in binary, is the palindrome 1101111011, so 19 is in the sequence.
		

Crossrefs

Cf. A058848 (palindromic in base 10).