100843

Appears in sequences

• a(n) = Sum_{d|n} phi(d^phi(d)).at n=6A179117
• a(n) = 6*7^n+1.at n=5A199483
• Number of (n+1)X(5+1) 0..1 arrays with no 2X2 subblock having x11-x00 less than x10-x01.at n=3A251265
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having x11-x00 less than x10-x01.at n=31A251268
• Number of (4+1) X (n+1) 0..1 arrays with no 2 X 2 subblock having x11-x00 less than x10-x01.at n=4A251271
• a(n) = Sum_{k=1..n} (n/gcd(k,n))^(n/gcd(k,n) - 2).at n=6A342411
• a(n) = Sum_{k=1..n} (n/gcd(k,n))^(n-2).at n=6A342412