227873431500
domain: N
Appears in sequences
- De Bruijn's S(3,n): (3n)!/(n!)^3.at n=9A006480
- Multinomial coefficient n!/([n/3]![(n+1)/3]![(n+2)/3]!).at n=27A022916
- a(n) = (9n)!/(9!^n).at n=3A172613
- Number of 9*n X n 0..1 arrays with row sums 2 and column sums 18.at n=2A172614
- Number of permutations of 9 copies of 1..n with all adjacent differences <= 2 in absolute value.at n=3A177314
- Number of permutations of 9 copies of 1..n with all adjacent differences <= 3 in absolute value.at n=3A177315