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A338071
Values of w(k) when w(k-2), w(k-1), and w(k) are all odd, where w is A336957.
4
3263, 7183, 11671, 16291, 16601, 20741, 23257, 28639, 37667, 33163, 38819, 43849, 51469, 52789, 48701, 50275, 63323, 65117, 67903, 67223, 79751, 72193, 71265, 79183, 80743, 74741, 106483, 90571, 94159, 104467, 108043, 135821, 109771, 112561, 119149, 149387, 116377, 137951
OFFSET
1,1
COMMENTS
See comments in A337644.
It would be nice to understand what is special about these numbers. The majority of them appear to products of two distinct primes. There seems to be very little overlap with either A337646 or A338057, although 1531513 appears both here and in A337646.
LINKS
EXAMPLE
The factorizations of the first 10 terms are:
1, (13)*(251)
2, (11)*(653)
3, (11)*(1061)
4, (11)*(1481)
5, (13)*(1277)
6, (7)*(2963)
7, (13)*(1789)
8, (13)*(2203)
9, (7)*(5381)
10, (13)*(2551)
The factorizations of terms 555 through 575 are:
555, (11)*(118681)
556, (7)*(213833)
557, (7)*(213887)
558, (11)*(118901)
559, (3)*(5)*(83059)
560, (11)*(120619)
561, (13)*(98867)
562, (11)*(121021)
563, (13)*(99391)
564, (7)*(218873)
565, (11)*(121621)
566, (13)*(99571)
567, (13)*(99989)
568, (11)*(122299)
569, (13)*(122503)
570, (11)*(122533)
571, (11)*(122579)
572, (13)*(100537)
573, (7)*(221537)
574, (11)*(123427)
575, (31)*(38393)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 19 2020
STATUS
approved