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Search: id:A018788
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A018788 Number of subsets of { 1, ..., n } containing an A.P. of length 3. +0
1
0, 0, 0, 1, 3, 9, 24, 63, 150, 343, 746, 1605, 3391, 7075, 14624, 30076, 61385, 124758, 252618, 510161, 1027632, 2066304, 4148715, 8322113, 16680369, 33413592, 66904484, 133923906, 268009597, 536257466, 1072861536, 2146225299, 4293173040 (list; graph; listen)
OFFSET

0,5

CROSSREFS

Adjacent sequences: A018785 A018786 A018787 this_sequence A018789 A018790 A018791

Sequence in context: A079282 A117585 A006684 this_sequence A098690 A090400 A123888

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.


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