66166

Appears in sequences

• Numbers having four 6's in base 10.at n=13A043516
• Numbers n which in decimal have the form imj, where m is the middle digit, with property that j is the reversal of i, and i = m*j.at n=14A082945
• Near-repdigit semiprimes with 6 as repeated digit.at n=23A105987
• Number of partitions with maximum rectangle n.at n=18A115724
• Number of nX5 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=6A300495
• Number of nX7 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=4A300497
• a(n) = 6*(10^(2*n+1)-1)/9 - 5*10^n.at n=2A332161