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A068965 Sides of integer Heronian triangles [prime(A068964(n)), prime(A068964(n)+1), a(n)] with area A068966(n). 2
4, 20, 170, 452, 890, 2180, 4052, 5210, 6500, 10100, 27380, 43220 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Eric Weisstein's World of Mathematics, Heronian Triangle.

EXAMPLE

A068964(3) = 24: [A000040(24), A000040(25),a(3)] = [89,97,170], with s = (89+97+170)/2 = 178: Area^2 = s*(s-89)*(s-81)*(s-170) = 178*89*81*8 = 10265616 = 3204*3204, therefore A068966(3) = 3204.

CROSSREFS

Sequence in context: A094651 A065526 A032333 * A185672 A054474 A066917

Adjacent sequences:  A068962 A068963 A068964 * A068966 A068967 A068968

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 30 2002

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Last modified February 17 09:17 EST 2012. Contains 206009 sequences.