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A363458
Numbers k such that k and k+1 are both in A363457.
0
1, 54, 242883, 246962, 261643, 266001, 353893, 380287, 425818, 457055, 542950, 581942, 595440, 831264, 917311, 980235, 1256341, 1719654, 6239931, 8237549, 8378312, 10995744, 11650985, 15123420, 15194370, 15442721, 19628056, 20034738, 20308106, 26218271, 36099782
OFFSET
1,2
COMMENTS
Numbers k such that A025487(k) and A025487(k+1) are both products of distinct primorial numbers (A002110), i.e., both terms of A129912.
The corresponding values of A025487(k) are 1, 2310, 22841771267013565192326000, 26648733144849159391047000, ..., and the corresponding values of A025487(k+1) are 2, 2520, 22842063073200641551281000, 26649458453137387177510200, ... .
EXAMPLE
54 is a term since A025487(54) = 2310 and A025487(55) = 2520 are both products of distinct primorial numbers: 2310 = 2 * 3 * 5 * 7 * 11 and 2520 = 2 * (2 * 3) * (2 * 3 * 5 * 7).
CROSSREFS
KEYWORD
nonn
AUTHOR
Amiram Eldar, Jun 03 2023
STATUS
approved