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Search: id:A120212
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| A120212 |
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"a" values providing solution x = b in A120211 (i.e. y^2 = b^2*(a^2 - b)*( b + 1) with a, b legs in primitive Pythagorean triangles.). |
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+0
5
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| 3, 5, 7, 8, 9, 11, 13, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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First primitive Pythagorean triad: 3, 4, 5
Weierstrass equation. y^2 = x*( 3^2 - x)*( 4^2 + x)
Smallest integer solution (x, y) = (4,20)
As x = b, the first element in the sequence is a = 3
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CROSSREFS
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Sequence in context: A072668 A062958 A047486 this_sequence A093670 A049068 A071977
Adjacent sequences: A120209 A120210 A120211 this_sequence A120213 A120214 A120215
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KEYWORD
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nonn
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AUTHOR
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Giorgio Balzarotti, Paolo P. Lava (greenblue(AT)tiscali.it), Jun 10 2006
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