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A215257 Number of indecomposable permutations sortable by a double-ended queue. 4

%I

%S 0,1,1,3,13,67,383,2345,15069,100341,686515,4797997,34110765,

%T 245926667,1793867881,13214905229,98177212059,734746226575,

%U 5534054981071,41917876423855,319102504087883,2440086947417629,18733909260242195,144354928765952131,1116015033661158079,8654019249571514621,67292250859412467583,524583875375437922949

%N Number of indecomposable permutations sortable by a double-ended queue.

%C Suggested by _Peter Doyle_ in an email message, Sep 04 2012

%H N. J. A. Sloane, <a href="/A215257/b215257.txt">Table of n, a(n) for n = 0..100</a>

%F INVERTi transform of A182216.

%Y Cf. A003319, A182216, A216040, A215252.

%K nonn

%O 0,4

%A _N. J. A. Sloane_, Sep 07 2012. a(0)=0 added by _N. J. A. Sloane_, Sep 12 2012

%E Name clarified by _Peter Doyle_, Dec 13 2013

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Last modified February 18 04:48 EST 2020. Contains 332011 sequences. (Running on oeis4.)