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A271493
Arises in enumeration of locally convex functions.
2
1, 2, 4, 8, 14, 24, 40, 66, 106, 170, 270, 426, 668, 1044, 1626, 2526, 3914, 6054, 9352, 14428, 22236, 34244, 52704, 81070, 12465, 191594, 294410, 452298, 694734, 1066968, 1638456
OFFSET
1,2
COMMENTS
See Coscia-DeWitt (2016) for precise definition.
LINKS
Christopher Coscia, Jonathan DeWitt, Locally Convex Words and Permutations, Electronic Journal of Combinatorics. 23 (2), 2016, #P2.10. Eq. 4.5 gives a g.f.
CROSSREFS
Sequence in context: A208605 A123655 A084683 * A118544 A222037 A019274
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 15 2016
EXTENSIONS
More terms added by Christopher Coscia, May 30 2017
STATUS
approved