1009008000

Appears in sequences

• Number of arrangements of 1,2,..,n*n in an n X n matrix such that each row is increasing or decreasing.at n=4A062716
• Value of Product[k/sd(k,2),k=1..n], where sd(k,b) is the sum of the digits of k represented in base b.at n=15A109489
• Labelings of n diamond-shaped posets with 4 vertices per diamond where the labels follow the poset relations.at n=4A260331
• Triangle read by rows: T(n,m) is the number of inequivalent n X m matrices under action of the Klein group, with a sixth of 1s, 2s, 3s, 4s, 5s and 6s (ordered occurrences rounded up/down if n*m != 0 mod 6).at n=14A287022
• Irregular table: T(n,k) equals the number of alignments of length k of n strings each of length 3.at n=33A299041
• Denominator of the sum of inverse products of parts in all compositions of n.at n=16A323340
• T(m,n) is the number of linear extensions of n fork-join DAGs of width m, read by downward antidiagonals.at n=23A357297