57213

Appears in sequences

• Triangle: Number of asymmetric quasigroups of order n with k idempotents.at n=24A058176
• Number of binary strings of length n with no substrings equal to 0001 0100 or 1101.at n=20A164467
• a(n) is the minimal permanent of an n X n Hermitian Toeplitz matrix using all the integers 1, 2, ..., n and with all off-diagonal elements purely imaginary.at n=6A359616