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A369995 Irregular triangle read by rows: T(n,k) is the number of induced k-vertex subgraphs, up to isomorphism, of the hypercube graph of dimension n >= 0, 0 <= k <= 2^n. 3
1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 3, 6, 3, 3, 1, 1, 1, 1, 2, 3, 7, 12, 26, 42, 63, 54, 49, 27, 19, 6, 4, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,8
LINKS
EXAMPLE
Triangle begins:
1, 1;
1, 1, 1;
1, 1, 2, 1, 1;
1, 1, 2, 3, 6, 3, 3, 1, 1;
1, 1, 2, 3, 7, 12, 26, 42, 63, 54, 49, 27, 19, 6, 4, 1, 1;
...
CROSSREFS
Cf. A039754 (up to automorphisms of the hypercube), A369996 (row sums), A369997 (connected subgraphs).
Sequence in context: A367313 A201075 A131338 * A242784 A265313 A106498
KEYWORD
nonn,tabf,more
AUTHOR
STATUS
approved

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Last modified June 15 11:14 EDT 2024. Contains 373407 sequences. (Running on oeis4.)