222220

Appears in sequences

• a(n) is the least positive integer in base 10 containing n twos that is divisible by n.at n=4A112893
• For k in {2,3,...,9} define a sequence as follows: a(0)=0; for n>=0, a(n+1)=a(n)+1, unless a(n) ends in k, in which case a(n+1) is obtained by replacing the last digit of a(n) with the digit(s) of k^2. This is k(4).at n=45A237341
• Like 5-white numbers but with blocks of 5 starting at left.at n=6A277398
• Array read by rows: T(n,k) is the first number with n prime factors (counted with multiplicity) and n occurrences of decimal digit k.at n=42A375784