22119

Appears in sequences

• Number of partitions of n into 8 unordered relatively prime parts.at n=47A023028
• Divisors of 99999999.at n=27A027890
• Divisors of 10^16 - 1.at n=44A111211
• Numbers k that divide 10^(k+1)-1.at n=42A175203
• Number of (n+1)X(4+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=0A250672
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=6A250676
• Number of (1+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=3A250677
• Numbers n which are both happy (A007770) and bihappy (A257795) numbers.at n=31A257950
• Number of closed Deutsch paths whose area is exactly n.at n=19A333098
• Products p*q*r of three distinct primes such that (p*q) mod r, (p*r) mod q and (q*r) mod p are all prime.at n=24A338704
• a(n) is the least number k such that A066323(k) = n.at n=24A342728
• G.f.: Sum_{k>=0} x^k * Product_{j=1..6*k} (1 + x^j)/(1 - x^j).at n=21A385092