227328

Appears in sequences

• Number of loops of length 4n on square grid that turn at each step and return to start in original direction.at n=9A000644
• Expansion of x*(1 + x)/(1 - 2*x)^3.at n=12A276289
• Heinz numbers of integer partitions, with at least three parts, whose product of parts is one fewer than their sum.at n=20A325043