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A194672
Triangle read by rows: number of genlex Gray paths on subcubes that use a certain restricted set of transformations.
1
1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 5, 10, 4, 1, 1, 6, 36, 35, 5, 1, 1, 9, 310, 4630, 218, 6, 1
OFFSET
0,5
COMMENTS
See Knuth Vol. 4A page 737 for precise definition.
REFERENCES
D. E. Knuth, The Art of Computer Programming, vol. 4A, Combinatorial Algorithms, Section 7.2.1.3 (p. 737).
EXAMPLE
Triangle begins:
1
1 1
1 2 1
1 3 3 1
1 5 10 4 1
1 6 36 35 5 1
1 9 310 4630 218 6 1
...
CROSSREFS
Cf. A194673.
Sequence in context: A214987 A203946 A128545 * A034364 A183610 A261365
KEYWORD
nonn,tabl,more
AUTHOR
N. J. A. Sloane, Sep 01 2011
STATUS
approved