52952

Appears in sequences

• a(n) = T(2n-1,n-2), T given by A026648.at n=7A026653
• Number of (n+1) X 6 0..1 matrices with each 2 X 2 subblock idempotent.at n=15A224547
• a(n) = T(n, 4) with T(n, k) = Sum_{d|k} phi(d)*binomial(n - 1 + k/d, k/d).at n=32A327032