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 A085685 Triangle read by rows: T(n,k), n >= 0, 0 <= k <= n, is size of maximal 1-transposition-correcting code formed using binary vectors of length n and weight k. The end-around transposition is allowed. 1
 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 2, 3, 6, 3, 2, 1, 1, 2, 4, 7, 7, 4, 2, 1, 1, 2, 6, 10, 12, 10, 6, 2, 1, 1, 3, 7, 18, 21, 21, 18, 7, 3, 1, 1, 3, 9, 21, 33, 37, 33, 21, 9, 3, 1, 1, 3, 11, 28, 52, 63, 63, 52, 28, 11, 3, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,18 LINKS N. J. A. Sloane, Challenge Problems: Independent Sets in Graphs EXAMPLE Triangle begins 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 1 1 CROSSREFS Row sums are A057657. Sequence in context: A027926 A114730 A031282 * A267632 A112465 A112468 Adjacent sequences:  A085682 A085683 A085684 * A085686 A085687 A085688 KEYWORD nonn,tabl AUTHOR N. J. A. Sloane, Jul 17 2003 EXTENSIONS Row 10 from Brian Borchers (borchers(AT)nmt.edu), Apr 14 2005 Row 11 from Brian Borchers (borchers(AT)nmt.edu), Nov 04 2009 STATUS approved

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Last modified January 18 16:27 EST 2020. Contains 331011 sequences. (Running on oeis4.)