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A322060
Expansion of generating function related to a certain class of combinatorial objects.
1
1, 4, 10, 26, 54, 144
OFFSET
1,2
COMMENTS
For precise definition see Example 15.3.6 of Miklos Bona, editor, Handbook of Enumerative Combinatorics, CRC Press, 2015, pages 1001-1002.
REFERENCES
Miklos Bona, editor, Handbook of Enumerative Combinatorics, CRC Press, 2015, pages 1001, 1002.
CROSSREFS
Cf. A322059.
Sequence in context: A200455 A269064 A307415 * A022812 A192306 A276432
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Dec 25 2018
STATUS
approved