A068964 - OEIS

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A068964

Numbers that define integer Heronian triangles [prime(a(n)), prime(a(n)+1), A068965(n)] with area A068966(n).

2, 5, 24, 49, 87, 182, 307, 379, 458, 677, 1618, 2427 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	LINKS	`Eric Weisstein's World of Mathematics, Heronian Triangle.`
	EXAMPLE	`a(3) = 24: [A000040(24), A000040(25), A068965(3)] = [89,97,170], with s = (89+97+170)/2 = 178: Area^2 = s(s-89)(s-81)(s-170) = 17889818 = 10265616 = 3204*3204, therefore A068966(3) = 3204.`
	CROSSREFS	`Sequence in context: A130379 A047147 A111047 * A200402 A010365 A012262` `Adjacent sequences: A068961 A068962 A068963 * A068965 A068966 A068967`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 30 2002`

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Last modified February 16 21:17 EST 2012. Contains 205971 sequences.