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%I
%S 1,1,1,1,2,2,1,5,5,4,2,16,16,14,10,5,61,61,56,46,32,16,272,272,256,
%T 224,178,122,61,1385,1385,1324,1202,1024,800,544,272,7936,7936,7664,
%U 7120,6320,5296,4094,2770,1385,50521,50521,49136,46366,42272,36976,30656,23536,15872,7936,353792
%N Triangle of Euler-Bernoulli or Entringer numbers.
%D B. Bauslaugh and F. Ruskey, Generating alternating permutations lexicographically, Nordisk Tidskr. Informationsbehandling (BIT) 30 16-26 1990.
%D R. C. Entringer, A combinatorial interpretation of the Euler and Bernoulli numbers, Nieuw Archief voor Wiskunde, 14 (1966), 241-246.
%D M. Josuat-Verges, J.-C. Novelli and J.-Y. Thibon, The algebraic combinatorics of snakes, Arxiv preprint arXiv:1110.5272, 2011
%D C. Poupard, De nouvelles significations enumeratives des nombres d'Entringer, Discrete Math., 38 (1982), 265-271.
%H J. Millar, N. J. A. Sloane and N. E. Young, A new operation on sequences: the Boustrophedon on transform, J. Combin. Theory, 17A 44-54 1996 (<a href="http://neilsloane.com/doc/bous.txt">Abstract</a>, <a href="http://neilsloane.com/doc/bous.pdf">pdf</a>, <a href="http://neilsloane.com/doc/bous.ps">ps</a>).
%Y Cf. A008282.
%K nonn,tabl,easy,nice
%O 0,5
%A _N. J. A. Sloane_.
%E More terms from Will Root (crosswind(AT)bright.net), Oct 08 2001
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