49873

Appears in sequences

• Numerator of [x^n] of the Taylor series log(arctan(x)/log(x+1)).at n=7A013570
• Number of partitions satisfying cn(0,5) <= cn(2,5) and cn(0,5) <= cn(3,5).at n=44A039838
• Numerator of sum(1/(phi(k)sigma(k)),k=1..n), where phi(k) is the totient function and sigma(k) is the sum of the divisors function.at n=14A104526
• The (1,4) entry in the matrix M^n, where M is the 4 X 4 matrix [[0,-1,1,0],[0,0,-1,1],[1,1,1,0],[0,1,1,1]].at n=23A122822