OFFSET
1,3
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 1..50
A. L. L. Gao, S. Kitaev, P. B. Zhang. On pattern avoiding indecomposable permutations, arXiv:1605.05490 [math.CO], 2016.
FORMULA
G.f.: 1 - 1/g(x), where g(x) is the (at present unknown) g.f. for A061552. - Vaclav Kotesovec, Apr 03 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 02 2017
EXTENSIONS
More terms from Vaclav Kotesovec, Apr 03 2017
Name corrected by Michael D. Weiner, Apr 10 2018
STATUS
approved