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Search: id:A104805
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| A104805 |
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"Ceiling of hypotenuses": a(n)=ceiling[sqrt[a(n-1)^2+a(n-2)^2]], a(1)=1, a(2)=3. |
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+0
7
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| 1, 3, 4, 5, 7, 9, 12, 15, 20, 25, 33, 42, 54, 69, 88, 112, 143, 182, 232, 295, 376, 478, 609, 775, 986, 1255, 1597, 2032, 2585, 3289, 4184, 5322, 6770, 8612, 10955, 13935, 17726, 22548, 28682, 36484, 46409, 59033, 75092, 95519, 121502, 154553, 196595, 250073
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OFFSET
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1,2
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MATHEMATICA
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a[n_] := a[n] = Ceiling[ Sqrt[ a[n - 1]^2 + a[n - 2]^2]]; a[1] = 1; a[2] = 3; Table[ a[n], {n, 48}] (from Robert G. Wilson v Mar 28 2005)
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CROSSREFS
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Cf. A104803, A104804.
Sequence in context: A010420 A035260 A035249 this_sequence A102822 A167159 A164572
Adjacent sequences: A104802 A104803 A104804 this_sequence A104806 A104807 A104808
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Mar 26 2005
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 28 2005
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