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A288540
Number of Dyck paths of semilength n such that the minimal number of peaks over all positive levels equals one.
2
1, 0, 2, 5, 13, 35, 112, 368, 1208, 3992, 13449, 46187, 160804, 565535, 2005796, 7168058, 25793100, 93388250, 340005973, 1244062960, 4572478054, 16874672868, 62508259095, 232338076267, 866289458048, 3239350667761, 12145345634715, 45649270140732
OFFSET
1,3
LINKS
EXAMPLE
: a(3) = 2:
:
: /\ /\
: /\/ \ / \/\ .
CROSSREFS
Column k=1 of A288387.
Cf. A000108.
Sequence in context: A148293 A148294 A148295 * A327014 A331030 A046171
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jun 11 2017
STATUS
approved