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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See Coscia-DeWitt (2016) for precise definition.

LINKS

Table of n, a(n) for n=1..31.

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

Cf. A271491, A271492.

Sequence in context: A208605 A123655 A084683 * A118544 A222037 A019274

Adjacent sequences:  A271490 A271491 A271492 * A271494 A271495 A271496

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Apr 15 2016

EXTENSIONS

More terms added by Christopher Coscia, May 30 2017

STATUS

approved

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Last modified September 17 12:41 EDT 2019. Contains 327131 sequences. (Running on oeis4.)