56421

Appears in sequences

• Number of binary strings of length n with equal numbers of 00001 and 10001 substrings.at n=17A164204
• a(n) = Sum_{d|n} d^d * binomial(n/d-1,d-1).at n=51A376018
• a(n) = Sum_{k=0..n-1} binomial(6*k,k) * binomial(6*n-6*k-2,n-k-1).at n=5A386368