21915

Appears in sequences

• a(n)=largest permutational number of order n - smallest permutational number of order n+1 : A062813(n)-A134703(n+1) : A134640(!n)-A134640(!n+1).at n=5A134748
• Numbers n which divide the periodic part (with zeros at end) of the decimal expansion of 1/n.at n=15A179267
• Numbers m such that m^2+1 is semiprime with (m-1)^2+1 and (m+1)^2+1 primes.at n=38A321985
• a(n) = sum of all distinct multiplicities in every integer partition of n.at n=26A373273