248031

Appears in sequences

• a(n) = (2^(n-1)/n!) * Product_{k=1..n-1} (2^k-1).at n=7A091669
• General q-Narayana triangle sequence: T(n, k) = Product_{j=0..1} (q-binomial(n+j, j+k, 2)/q-binomial(n-k+j, j, 2)).at n=23A156916
• General q-Narayana triangle sequence: T(n, k) = Product_{j=0..1} (q-binomial(n+j, j+k, 2)/q-binomial(n-k+j, j, 2)).at n=25A156916
• Triangle of numbers S(n,k) (0 <= k <= n) arising in the enumeration of interval orders without duplicated holdings.at n=32A259876
• Irregular triangle read by rows: T(n, k) is the q-multinomial coefficient defined by the k-th partition of n in Abramowitz-Stegun order, evaluated at q = 2.at n=37A347485