A350615 Indices of 1's in A350877.

1, 8, 12, 20, 742, 513152128

Offset: 1

Author

Hans Havermann, Jan 22 2022

Keywords

• nonn
• hard
• more

Comments

This sequence is probably infinite, but may grow extremely rapidly. Russ Cox has checked that there are no further terms below 4.9*10^12. - N. J. A. Sloane, Jan 25 2022

Examples

			The 1 at 513152128 is a down-drop from 2^32 at index 513152096 in A350877, 2^32 being 712032365 at index 513152095 plus the prime 3582934931.
		

Crossrefs

Cf. A350877, A350616.

See A362107, A362108 for the chains of powers of 2 that lead to these 1's.