41655

Appears in sequences

• Number of 5-tuples of different integers from [ 2,n ] with no global factor.at n=23A015641
• Indices of primes in sequence defined by A(0) = 91, A(n) = 10*A(n-1) + 51 for n > 0.at n=20A101012
• Expansion of (1+3*x)/(1-x^2-2*x^3).at n=25A159285
• Number of 4-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and avoiding the patterns z z+1 z+2 and z z-1 z-2.at n=30A209116