222222223

Appears in sequences

• Jacobsthal sequence (A001045) as represented in base 4.at n=19A081857
• Concatenation of n 2's followed by 3.at n=7A091628
• Expansion of g.f. (1-8*x)/((1-x)*(1-10*x)).at n=9A093135
• Semiprimes at Levenshtein distance n from previous value when considered as a decimal string.at n=9A109378
• Array read by downward antidiagonals: T(k,n) is the least number that has k prime factors (counted with multiplicity) and is the concatenation of n primes, or -1 if there is no such number.at n=46A374376