69048

Appears in sequences

• Expansion of e.g.f. cosh(log(1+x)/cos(x)).at n=8A009137
• a(n) = |{m : multiplicative order of 8 mod m = n}|.at n=39A059890
• Triangle read by rows: T(n,m)=A154694(n,m)-A154694(n,0)+1.at n=22A174673
• Triangle read by rows: T(n,m)=A154694(n,m)-A154694(n,0)+1.at n=26A174673
• Numbers k such that (43*10^k + 47)/9 is prime.at n=19A296094
• a(n) is the sum of the decimal digits of (n!)!.at n=7A301861
• Number of nX4 0..1 arrays with every element unequal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=10A318033
• Numbers that are the sum of four third powers in exactly nine ways.at n=20A345154
• Expansion of Sum_{0<i<j<k<l} q^(2*(i+j+k+l)-4)/( (1-q^(2*i-1))*(1-q^(2*j-1))*(1-q^(2*k-1))*(1-q^(2*l-1)) )^2.at n=35A365666