40824000

Appears in sequences

• For n people on one side of a river, the number of ways they can all travel to the opposite side following the pattern of 2 sent, 1 returns, 2 sent, 1 returns, ..., 2 sent.at n=6A167484
• Triangle, read by rows, where the g.f. of row n equals the sum of permutations of compositions of functions (1 + k*y*x) for k=1..n with parameter y independent of variable x, as evaluated at x=1.at n=48A277408
• Denominator of the greatest probability that a particular free polyomino with n cells appears in the version of the Eden growth model described in A367671.at n=6A367674