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Search: id:A064650
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| A064650 |
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a(n)=floor[a(n-1)/2]+a(n-2) with a(0)=1 and a(1)=2. |
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+0
2
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| 1, 2, 2, 3, 3, 4, 5, 6, 8, 10, 13, 16, 21, 26, 34, 43, 55, 70, 90, 115, 147, 188, 241, 308, 395, 505, 647, 828, 1061, 1358, 1740, 2228, 2854, 3655, 4681, 5995, 7678, 9834, 12595, 16131, 20660, 26461, 33890, 43406, 55593, 71202, 91194, 116799, 149593
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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Harry J. Smith, Table of n, a(n) for n=0,...,400
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FORMULA
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a(n) =A064651(n)+1. a(n)/a(n-1) tends to (1+sqrt(17))/4=1.2807764...
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PROGRAM
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(PARI) { for (n=0, 400, if (n>1, a=a1\2 + a2; a2=a1; a1=a, if (n, a=a1=2, a=a2=1)); write("b064650.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Sep 21 2009]
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CROSSREFS
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Cf. A064324, A064325.
Sequence in context: A118082 A120160 A017980 this_sequence A130083 A117357 A029020
Adjacent sequences: A064647 A064648 A064649 this_sequence A064651 A064652 A064653
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KEYWORD
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nonn
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), Oct 04 2001
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