420512

Appears in sequences

• Gessel-Stanley triangle read by rows: triangle of coefficients of polynomials arising in connection with enumeration of intransitive trees by number of nodes and number of right nodes.at n=48A029847
• Gessel-Stanley triangle read by rows: triangle of coefficients of polynomials arising in connection with enumeration of intransitive trees by number of nodes and number of right nodes.at n=53A029847
• a(n) is the number of asymmetrical polyiamonds of n cells.at n=15A359688