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A067542
Primes p such that p+5==0 (mod phi(p+5)).
1
3, 7, 11, 13, 19, 31, 43, 59, 67, 103, 139, 157, 211, 251, 283, 379, 571, 643, 859, 967, 1019, 1291, 1453, 1531, 1723, 3067, 4091, 4603, 5179, 5827, 6907, 17491, 18427, 20731, 24571, 41467, 55291, 82939, 93307, 98299, 104971, 110587, 118093, 147451
OFFSET
1,1
LINKS
MATHEMATICA
Select[Prime[Range[14000]], Mod[#+5, EulerPhi[#+5]]==0&] (* Harvey P. Dale, Jan 14 2022 *)
CROSSREFS
Sequence in context: A186645 A077256 A341864 * A346156 A129748 A310198
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Feb 22 2002
STATUS
approved