OFFSET
1,2
COMMENTS
These are the values of n such that A336957(n) = n. Is this sequence finite or infinite?. We do not know. Also, why are the terms (except the first, which is special) even?
The known values of n such that A336957(n) = n+1 are 43, 103, 191, 203, 207, 211, 243, 247, 251, 287, 291, 303, 327, 399, 8133, 71071, 579451, 10955983. Are there more terms? We do not know. Also, why are all the terms odd?
The known values of n such that A336957(n) = n-1 are 31, 87, 187, 215, 255, 283, 307, 315, 347, 551, 10697, 30525, 46195, 478607, 3856311, 6405255. Same questions!
All these values were computed from Frank Stevenson's file of the first 11333576 terms of A336957.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Scott R. Shannon and N. J. A. Sloane, Oct 10 2020
STATUS
approved