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Search: id:A112027
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| A112027 |
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a(1)=1; then successively add 1, divide by 2, add 2 and then total up the last 4 terms. |
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+0
1
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| 1, 2, 1, 3, 7, 8, 4, 6, 25, 26, 13, 15, 79, 80, 40, 42, 241, 242, 121, 123, 727, 728, 364, 366, 2185, 2186, 1093, 1095, 6559, 6560, 3280, 3282, 19681, 19682, 9841, 9843, 59047, 59048, 29524, 29526, 177145, 177146, 88573, 88575, 531439, 531440, 265720, 265722, 1594321
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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Joshua Zucker, Posting to Seq Fan mailing list, Nov 24 2005
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MAPLE
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a[1]:=1; k:=1; for n from 1 to 16 do k:=k+1; a[k]:=a[k-1]+1; k:=k+1; a[k]:=a[k-1]/2; k:=k+1; a[k]:=a[k-1]+2; k:=k+1; a[k]:=a[k-1]+a[k-2]+a[k-3]+a[k-4]; od;
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CROSSREFS
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Sequence in context: A010757 A019320 A033640 this_sequence A024404 A077173 A063509
Adjacent sequences: A112024 A112025 A112026 this_sequence A112028 A112029 A112030
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Nov 24 2005
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EXTENSIONS
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Definition found by Franklin T. Adams-Watters, Feb 01, 2006
More terms from N. J. A. Sloane (njas(AT)research.att.com), Feb 22 2006
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