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A011869 [ n(n-1)/16 ]. 0
0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 9, 11, 13, 15, 17, 19, 21, 23, 26, 28, 31, 34, 37, 40, 43, 47, 50, 54, 58, 62, 66, 70, 74, 78, 83, 87, 92, 97, 102, 107, 112, 118, 123, 129, 135, 141, 147, 153, 159, 165, 172, 178, 185, 192, 199, 206, 213, 221, 228, 236, 244, 252, 260 (list; graph; refs; listen; history; internal format)
OFFSET

0,8

CROSSREFS

Sequence in context: A191886 A184115 A050418 * A177738 A134030 A100054

Adjacent sequences:  A011866 A011867 A011868 * A011870 A011871 A011872

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 17 04:24 EST 2012. Contains 205978 sequences.