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 A160352 Numbers of the form pqr, where p

%I #11 Aug 02 2023 09:38:45

%S 30,42,66,78,102,110,114,138,174,182,186,190,222,246,258,282,290,310,

%T 318,354,366,402,406,410,426,435,438,465,474,498,506,534,574,582,590,

%U 602,606,610,618,642,654,678,710,762,786,790,822,834,861,885,890,894

%N Numbers of the form pqr, where p<q<r are primes such that r = +/-1 (mod pq).

%C A subsequence of A007304. The odd terms are listed in A160353.

%H Robin Visser, <a href="/A160352/b160352.txt">Table of n, a(n) for n = 1..10000</a>

%o (PARI) for( pqr=1, 1999, my(f=factor(pqr)); #f~==3 & vecmax(f[, 2])==1 & abs((f[3, 1]+1)%(f[1, 1]*f[2, 1])-1)==1 & print1(pqr ", "))

%Y Cf. A007304, A160353.

%K nonn

%O 1,1

%A _M. F. Hasler_, Jun 03 2009

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Last modified April 21 04:17 EDT 2024. Contains 371850 sequences. (Running on oeis4.)