873392

Appears in sequences

• Robbins triangle read by rows: T(n,k) = number of alternating sign n X n matrices with a 1 at top of column k (n >= 1, 1<=k<=n).at n=29A048601
• Robbins triangle read by rows: T(n,k) = number of alternating sign n X n matrices with a 1 at top of column k (n >= 1, 1<=k<=n).at n=34A048601
• Second diagonal of triangle A048601.at n=6A051106
• a(n) = (5n+2)*C(n) where C(n) = Catalan numbers (A000108).at n=10A053368
• G.f. satisfies A(x) = 1 + x*A(x) / (1 + x*A(x))^3.at n=14A365086