A350615 - OEIS

A350615

Indices of 1's in A350877.

1, 8, 12, 20, 742, 513152128

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

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

a(7) > 10^16. - Benjamin Chaffin, May 18 2026

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

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.

Sequence in context: A258848 A072843 A354069 * A300065 A072902 A269705

Adjacent sequences: A350612 A350613 A350614 * A350616 A350617 A350618

KEYWORD

nonn,hard,more,changed

AUTHOR

Hans Havermann, Jan 22 2022

STATUS

approved