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A145821 Prime numbers p such that 17,p,p+1 is a Heron triangle, that is a triangle with integer sides and integer area. 1

%I #3 Mar 31 2012 14:40:24

%S 89,233,103049,118919033,158366141778329,413966186053289,

%T 210898408132067372729,551284565493459521033,243376580230015368399209,

%U 636181910862832304910809

%N Prime numbers p such that 17,p,p+1 is a Heron triangle, that is a triangle with integer sides and integer area.

%C Subsequence of A145820. The next few terms are at n = 186, 236, 522, 812, 1064 and 1292, of that sequence. A145820(1292) is a prime of 331 digits.

%Y Subsequence of A000040 and of A145820.

%K nonn

%O 1,1

%A _James R. Buddenhagen_, Oct 20 2008

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Last modified July 31 04:10 EDT 2024. Contains 374774 sequences. (Running on oeis4.)