3429216

Appears in sequences

• a(n) = Product_{j=0..floor(n/2)} binomial(n,j).at n=8A061778
• Fifth column (m=4) of triangle A090447.at n=5A090449
• Triangle T(n,m) = coefficient of x^n (x^2*cosech(x))^m=sum(n>=m, T(n,m)x^n*m!^2/n!^2).at n=40A199568
• a(n) = Product_{i=floor((n + 1)/2)..n-1} binomial(n-1, i).at n=9A208653
• Numbers m = concat(s,t) such that m = sigma(s) * sigma(t), where sigma(x) is the sum of the divisors of x.at n=7A253824
• Sequence starting with a(1) = 2 and always extended with the product "n-th digit * n-th term". When the product is = 0, we don't extend the sequence with 0 but with the smallest integer not yet present.at n=31A337109