82640

Appears in sequences

• Numbers k that divide the (left) concatenation of all numbers <= k written in base 11 (most significant digit on left).at n=29A029480
• Numbers k such that the concatenation of k with k+9 gives a square.at n=6A115430
• Numbers k such that k concatenated with k-7 gives the product of two numbers which differ by 8.at n=9A116113
• Numbers k such that k concatenated with itself gives the product of two numbers which differ by 6.at n=10A116159
• Number of subsets {x(1),x(2),...,x(k)} of {1,2,...,n} such that all differences |x(i)-x(j)| are distinct.at n=29A143823
• Number of nX2 1..4 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nondecreasing order.at n=12A166797