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A369999
Irregular triangle read by rows: T(n,k) is the number of connected induced k-vertex subgraphs of the hypercube graph of dimension n >= 0, 1 <= k <= 2^n.
2
1, 2, 1, 4, 4, 4, 1, 8, 12, 24, 38, 48, 28, 8, 1, 16, 32, 96, 280, 784, 1952, 4304, 7280, 8720, 7136, 4192, 1804, 560, 120, 16, 1
OFFSET
0,2
EXAMPLE
Triangle begins:
1;
2, 1;
4, 4, 4, 1;
8, 12, 24, 38, 48, 28, 8, 1;
16, 32, 96, 280, 784, 1952, 4304, 7280, 8720, 7136, 4192, 1804, 560, 120, 16, 1;
...
CROSSREFS
Cf. A290758 (row sums), A369605 (up to automorphisms of the hypercube), A369997 (up to isomorphism).
Sequence in context: A274883 A140946 A008741 * A110316 A111975 A117250
KEYWORD
nonn,tabf,more
AUTHOR
STATUS
approved