12100000

Appears in sequences

• Numbers of the form (10^i)*(11^j), with i, j >= 0.at n=30A108779
• T(n,k) = number of (n+1) X (k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 1,1 or 1,2.at n=42A264071
• Number of (7+1) X (n+1) arrays of permutations of 0..n*8+7 with each element having index change +-(.,.) 0,0 1,1 or 1,2.at n=2A264076
• Numbers of the form d_1 d_2 d_3 ... where the sum of their digits multiplied by their digit positions is equal to their number of digits.at n=33A381135