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A350753
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Triangle read by rows: T(n,k) is the number of unlabeled strongly connected digraphs with n arcs and k vertices, n >= 0, k = 1..n+1.
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4
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1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 2, 1, 0, 0, 0, 1, 4, 1, 0, 0, 0, 1, 16, 7, 1, 0, 0, 0, 0, 22, 58, 10, 1, 0, 0, 0, 0, 22, 240, 165, 14, 1, 0, 0, 0, 0, 11, 565, 1281, 365, 18, 1, 0, 0, 0, 0, 5, 928, 6063, 4838, 733, 23, 1, 0, 0, 0, 0, 1, 1065, 19591, 38516, 14661, 1317, 28, 1, 0
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,13
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LINKS
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EXAMPLE
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Triangle begins:
1;
0, 0;
0, 1, 0;
0, 0, 1, 0;
0, 0, 2, 1, 0;
0, 0, 1, 4, 1, 0;
0, 0, 1, 16, 7, 1, 0;
0, 0, 0, 22, 58, 10, 1, 0;
0, 0, 0, 22, 240, 165, 14, 1, 0;
0, 0, 0, 11, 565, 1281, 365, 18, 1, 0;
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PROG
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(PARI) \\ See PARI link in A350489 for program code.
my(A=A350753rows(10)); for(n=1, #A, print(A[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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