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A069487 Areas of Pythagorean triangles (A069482, A069484, A069486). +0
4
30, 240, 840, 5544, 6864, 26520, 23256, 73416, 208104, 107880, 467976, 473304, 296184, 727560, 1494600, 2101344, 863760, 3138816, 2625864, 1492704, 5259504, 4248936, 7623384, 12845904, 7759224, 4244424 (list; graph; listen)
OFFSET

1,1

COMMENT

a(n)=A030078(n+1)*A000040(n)-A000040(n+1)*A030078(n).

FORMULA

a(n)=A000040(n+1)^3*A000040(n)-A000040(n+1)*A000040(n)^3.

CROSSREFS

Sequence in context: A064241 A080569 A081779 this_sequence A008385 A061167 A138404

Adjacent sequences: A069484 A069485 A069486 this_sequence A069488 A069489 A069490

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 29 2002

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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