OFFSET
1,1
COMMENTS
Numbers k such that A331750(k) is equal to 1+A048675(k), which in turn is equal to A048675(A225546(2*k)) = A048675(2*A225546(k)).
Among the first 60 terms, 15 are odd: 27, 1053, 1625, 4875, 1245699, 1303533, 1922375, 2011625, 2941029, 5767125, 6034875, 12733875, 17137575, 26316675, 29362905, and only 1053 = 3^4 * 13 is in A228058.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..60 (up to the term 33550336).
EXAMPLE
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Feb 05 2020
STATUS
approved