38685

Appears in sequences

• Numbers k such that k^2 * 2^k - 1 is prime.at n=25A058781
• Indices of primes in sequence defined by A(0) = 61, A(n) = 10*A(n-1) + 81 for n > 0.at n=27A101541
• a(n) = 46*n^2 - 1.at n=28A158634
• Number of nX3 0..1 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.at n=8A222536
• Numbers k such that either k^2*2^k-1 or k^2*2^k+1 is prime, but not both.at n=47A237759
• Number of (n+2)X(2+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011.at n=10A260761