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Search: id:A117634
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| A117634 |
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a(0)=0. a(n) = a(n-1) + 1 + (number of positive integers which are <= n and are missing from {a(0),a(1),a(2),...a(n-1)}). |
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+0
1
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| 0, 2, 4, 7, 10, 14, 19, 24, 30, 37, 44, 52, 61, 71, 81, 92, 104, 117, 131, 145, 160, 176, 193, 211, 229, 248, 268, 289, 311, 334, 357, 381, 406, 432, 459, 487, 516, 545, 575, 606, 638, 671, 705, 740, 775, 811, 848, 886, 925, 965, 1006, 1048, 1090, 1133, 1177
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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The sequence of positive integers not in this sequence begins 1, 3, 5, 6, 8,...
Because there are four such terms <= 7, then a(7) = a(6) + 1 + 4 = 24.
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CROSSREFS
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Sequence in context: A007980 A022339 A025711 this_sequence A022776 A025704 A025710
Adjacent sequences: A117631 A117632 A117633 this_sequence A117635 A117636 A117637
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KEYWORD
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easy,nonn
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), Apr 08 2006, definition corrected Apr 22 2006
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EXTENSIONS
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More terms from Sheedeh Dorri (spd145(AT)psu.edu), Apr 17 2006
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