3711916

Appears in sequences

• a(n) = C(n)*C(n+2) - C(n+1)^2 where C() are the Catalan numbers A000108.at n=9A005700
• Triangle of numbers of Dyck paths.at n=45A039797
• Triangle of numbers of Dyck paths.at n=46A039797
• Triangle read by rows: numbers of Dyck paths.at n=53A039798
• Triangle read by rows: numbers of Dyck paths.at n=54A039798
• Upper triangle of Catalan Number Wall.at n=57A078920
• Moment sequence of tr(A) in USp(4).at n=18A138349
• Triangle read by rows: Table III.5 of Myriam de Sainte-Catherine's 1983 thesis.at n=86A185249
• Triangle read by rows: the X-transformation of the Catalan triangle A033184.at n=46A228334
• Triangle read by rows: the Y-transformation of the Catalan triangle A033184.at n=45A228335
• Number of 10 up, 10 down permutations of [n].at n=22A229891