881970

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 1, 7, 8 and 9.at n=46A136880
• Labelings of n diamond-shaped posets with 4 vertices per diamond where the labels follow the poset relations whose associated reading permutation avoids 231 in the classical sense.at n=6A260332
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=0..n} binomial(n,j) * binomial(k*n+j+1,n)/(k*n+j+1).at n=61A336534