57414

Appears in sequences

• Triangle: m=3; e(n,k,n) = (k + m - 1)*e(n - 1, k, m) + (m*n - k + 1 - m)*e(n - 1, k - 1, m); t(n,k) = e(n,k,m) + e(n,n-k,m).at n=24A156186
• Numbers k such that 3*R_(k+2) + 10^k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=24A256458
• Number of achiral color patterns (set partitions) for a row or loop of length n using exactly 5 colors (sets).at n=16A304975