52873

Appears in sequences

• The next smallest pair of numbers is taken so that a(2n-1)/a(2n) converges to Pi.at n=36A057082
• Numerators of increasingly better rational approximations to Pi with increasing denominators (3/1, 13/4, 16/5, 19/6, 22/7, 179/57, ...)at n=16A063674
• a(n) = 2*a(n-1) + (-1)^n*a(floor(n/2)); a(1)=1.at n=15A089067
• Number of binary arrays indicating the locations of trailing edge maxima of a random length-n 0..7 array extended with zeros and convolved with 1,3,3,1.at n=22A222026
• Position of n-th appearance of 2n in the sequence of prime gaps (A001223). If 2n does not appear at least n times, set a(n) = -1.at n=28A356223
• Expansion of Sum_{k>0} (1/(1 - k*x^k)^4 - 1).at n=15A363640