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Number of meanders in which first bridge is 5.
(Formerly M2286)
1

%I M2286 #28 Jun 28 2017 15:17:12

%S 3,3,7,11,28,57,155,353,1003,2458,7214,18575,55880,149183,457639,

%T 1255933,3914103,10978240,34663182,98953078,315884786,915008430,

%U 2948378068,8645874055,28084475514,83222134020

%N Number of meanders in which first bridge is 5.

%D S. K. Lando and A. K. Zvonkin "Plane and projective meanders", Séries Formelles et Combinatoire Algébrique. Laboratoire Bordelais de Recherche Informatique, Université Bordeaux I, 1991, pp. 287-303.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H S. K. Lando and A. K. Zvonkin , <a href="/A005316/a005316_1.pdf">Plane and projective meanders</a>, Séries Formelles et Combinatoire Algébrique. Laboratoire Bordelais de Recherche Informatique, Université Bordeaux I, 1991, pp. 287-303. (Annotated scanned copy)

%Y Cf. A259974, A005316.

%K nonn

%O 5,1

%A _Simon Plouffe_

%E Offset corrected terms a(19)-a(30) added, _Andrew Howroyd_, Dec 15 2015