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Search: id:A126744
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| A126744 |
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Triangle read by rows: T(n,k) (n>=2, k=0..n-2) gives number of connected graphs on n nodes with clique number n-k. |
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+0
5
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| 1, 1, 1, 1, 2, 3, 1, 3, 11, 6, 1, 4, 25, 63, 19, 1, 5, 45, 266, 477, 59, 1, 6, 73, 785, 4646, 5339, 267, 1, 7, 109, 1908, 26205, 136935, 94535, 1380, 1, 8, 155, 4085, 110140, 1696407, 7121703, 2774240, 9832
(list; table; graph; listen)
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OFFSET
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2,5
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LINKS
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Keith M. Briggs, Combinatorial Graph Theory
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EXAMPLE
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Triangle begins:
n=...1...2...3...4....5....6.....7......8........9........10
k.------------------------------------------------------------
2|...0...1...1...3....6...19....59....267.....1380......9832 = A024607
3|...0...0...1...2...11...63...477...5339....94535...2774240 = A126745
4|...0...0...0...1....3...25...266...4646...136935...7121703 = A126746
5|...0...0...0...0....1....4....45....785....26205...1696407 = A126747
6|...0...0...0...0....0....1.....5.....73.....1908....110140 = A126748
7|...0...0...0...0....0....0.....1......6......109......4085
8|...0...0...0...0....0....0.....0......1........7.......155
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CROSSREFS
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Diagonals give A024607, A126745-A126748.
Sequence in context: A108990 A145080 A065078 this_sequence A122078 A126736 A127412
Adjacent sequences: A126741 A126742 A126743 this_sequence A126745 A126746 A126747
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KEYWORD
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nonn,tabl
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Feb 18 2007
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