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A076601
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a(1)=3, a(n_even)=(a(n-1)^2-1)/2; a(n_odd)=a(n-1)+1.
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0
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3, 4, 5, 12, 13, 84, 85, 3612, 3613, 6526884, 6526885, 21300113901612, 21300113901613
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| {3, 4, 5}, {5, 12, 13}, {13, 84, 85}... are sides {a<b<c} of the right triangles, with hypotenuse c=b+1.
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CROSSREFS
| Sequence in context: A055493 A109350 A077034 * A090829 A141290 A010752
Adjacent sequences: A076598 A076599 A076600 * A076602 A076603 A076604
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KEYWORD
| easy,nonn
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AUTHOR
| Zak Seidov (zakseidov(AT)yahoo.com), Oct 21 2002
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