-3623878656domain: ZAppears in sequencesEgyptian fraction expansion for Pi/4 = arctan(1/2) + arctan(1/3) (Hutton 1776).at n=26A157327Denominators of a BBP series for Pi/4.at n=27A164916a(n) = sin((2*n+5)*Pi/6)*(n+1)*2^(n+1).at n=26A176900