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A020656 Sequence contains no 6-term arithmetic progression. 1
0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 21, 22, 23, 24, 25, 32, 33, 34, 35, 36, 38, 42, 43, 44, 45, 46, 48, 49, 50, 51, 58, 59, 61, 62, 63, 64, 65, 67, 68, 70, 72, 76, 84, 86, 87, 88, 89, 90, 92, 95, 96, 97, 98, 99, 102, 103, 106, 110, 113, 114, 116, 117, 119, 121 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..71.

CROSSREFS

A005838(n-1) - 1.

Sequence in context: A045774 A045681 A001961 * A039116 A047201 A225496

Adjacent sequences:  A020653 A020654 A020655 * A020657 A020658 A020659

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 20 17:59 EDT 2013. Contains 225464 sequences.