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A107425
Numbers k such that (k + prime(k)) and (k+1 + prime(k+1)) are divisible by 7.
2
11, 58, 170, 184, 185, 208, 347, 354, 506, 523, 541, 561, 652, 655, 702, 703, 709, 710, 711, 730, 813, 814, 876, 925, 940, 947, 1012, 1062, 1157, 1164, 1173, 1174, 1213, 1269, 1326, 1375, 1412, 1429, 1430, 1486, 1534, 1537, 1544, 1545, 1590, 1657, 1682
OFFSET
1,1
LINKS
Zak Seidov, Table of n, a(n) for n = 1..14403 (all terms up to 50000)
MATHEMATICA
Select[Range[5000], Mod[Prime[ # ]+#, 7]+Mod[Prime[ #+1]+#+1, 7]==0&]
Select[Range[5000], And@@Divisible[{#+Prime[#], #+1+Prime[#+1]}, 7]&] (* Harvey P. Dale, Aug 09 2013 *)
CROSSREFS
Sequence in context: A014470 A285448 A048366 * A211921 A211795 A256226
KEYWORD
easy,nonn
AUTHOR
Zak Seidov, Jun 10 2005
STATUS
approved