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A350448
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Triangle read by rows: T(n,k) is the number of acyclic graphs on n unlabeled nodes whose longest directed path has k arcs.
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2
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1, 1, 0, 1, 1, 0, 1, 3, 2, 0, 1, 8, 14, 8, 0, 1, 20, 89, 128, 64, 0, 1, 55, 634, 1934, 2336, 1024, 0, 1, 163, 5668, 36428, 83648, 84992, 32768, 0, 1, 556, 67926, 959718, 3919584, 7097088, 6144000, 2097152, 0, 1, 2222, 1137641, 37205922, 268989920, 793138688, 1175224320, 880803840, 268435456, 0
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listen;
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text;
internal format)
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OFFSET
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0,8
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LINKS
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EXAMPLE
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Triangle begins:
1;
1, 0;
1, 1, 0;
1, 3, 2, 0;
1, 8, 14, 8, 0;
1, 20, 89, 128, 64, 0;
1, 55, 634, 1934, 2336, 1024, 0;
1, 163, 5668, 36428, 83648, 84992, 32768, 0;
...
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PROG
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(PARI) \\ See PARI link in A122078 for program code.
{ my(T=AcyclicDigraphsByLongestPath(8)); for(n=1, #T, print(T[n])) }
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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