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A324918 Partial sums of A324917. 2
1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 10, 10, 10, 10, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 23, 23, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

COMMENTS

Conjecture: lim_{n--> infinity}(log(a(n))/log(n)) exists and is positive.

Conjecture: a(n) >= A324965(n) for all n >= 13.

LINKS

Table of n, a(n) for n=1..69.

C. Defant, Counting 3-stack-sortable permutations, arXiv:1903.09138 [math.CO], 2019.

EXAMPLE

The first 10 terms of A324917 are 1, 0, 0, 0, 0, 0, 0, 0, 1, 0. These terms sum to 2, so a(10)=2.

CROSSREFS

Cf. A324917, A324965.

Sequence in context: A071903 A091372 A185322 * A068980 A280950 A279135

Adjacent sequences:  A324915 A324916 A324917 * A324919 A324920 A324921

KEYWORD

nonn

AUTHOR

Colin Defant, Mar 18 2019

STATUS

approved

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Last modified November 13 02:59 EST 2019. Contains 329085 sequences. (Running on oeis4.)