39972

Appears in sequences

• Indices of primes in sequence defined by A(0) = 73, A(n) = 10*A(n-1) + 13 for n > 0.at n=6A101140
• a(n) = 4*(10^n-7).at n=3A177112
• Numbers k such that phi(k-6) = phi(k) = phi(k+6).at n=35A217006
• T(n,k)=Number of nXk 0..1 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.at n=57A222769
• Number of 3Xn 0..1 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.at n=8A222771
• Numbers that are the sum of seven fourth powers in eight or more ways.at n=33A345574
• Numbers that are the sum of seven fourth powers in exactly eight ways.at n=23A345830
• Number of free polynars with n cells.at n=6A390620