390012

Appears in sequences

• Triangle W, read by rows, where column k of W = column 0 of W^(k+1) for k>=0 such that W equals the matrix cube of P = A136220 with column 0 of W = column 0 of P shift up one row.at n=30A136231
• Matrix cube of triangle W = A136231; also equals P^9, where P = triangle A136220.at n=15A136238
• The number of regions inside a hexagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.at n=9A331931