51979

Appears in sequences

• Smaller of a pair of consecutive lucky numbers with a gap of 2n.at n=29A031884
• Number of nonprimes among the numbers in {1,2,3,...,n!} which are relatively prime to n!.at n=9A067393
• Number of steps to go from 2^(n+1)-1 to (2^n)-1 using the iterative process described in A071542.at n=19A213709
• Number of 3Xn 0..1 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.at n=9A222543