A296580 Odd primes p such that tau(p) is congruent to (p-1)/2 (mod p), where tau is the Ramanujan tau function (A000594).
191, 5399, 1259393
Offset: 1
Examples
tau(191) = 2762403350592 and 2762403350592 == 95 mod 191, so a(1) = 191. tau(5399) = -616400667743946780600 and -616400667743946780600 == 2699 mod 5399, so a(2) = 5399. tau(1259393) = -600367974333827988240021654527358 and -600367974333827988240021654527358 == 629696 mod 1259393, so a(3) = 1259393.
Links
- Eric Weisstein's World of Mathematics, Tau Function.
- Wikipedia, Ramanujan tau function
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