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A245363 Numbers n for which A242719(n) = prime(n)*(prime(n)+6) + 1. 4

%I #53 Sep 09 2014 20:46:28

%S 19,37,49,69,73,102,165,236,253,365,465,542,595,694,713,723,762,920,

%T 962,979,1119,1162,1259,1334,1387,1441,1706,1797,1843,1906

%N Numbers n for which A242719(n) = prime(n)*(prime(n)+6) + 1.

%C These are such numbers n for which prime(n), prime(n)+6, prime(n)*(prime(n)+6)-2 are primes, but prime(n) is not in A062326; besides, if prime(n) is in A001359, then also prime(n+1) is not in A062326.

%C Prime(n)*(prime(n)+6) + 1 is the third minimal possible value of A242719(n) after prime(n)^2 + 1 and (prime(n)+2)^2 + 1 (cf. A247011 and comment there).

%F prime(n) == 7 (mod 10), A242719(n) == 92 (mod 100).

%Y Cf. A242719, A246748, A247011.

%K nonn

%O 1,1

%A _Vladimir Shevelev_, Sep 09 2014

%E More terms from _Peter J. C. Moses_, Sep 09 2014

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Last modified April 24 19:52 EDT 2024. Contains 371963 sequences. (Running on oeis4.)