182804domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(804).at n=8A042550The integer part of the surface area of the 4-dimensional sphere of radius n.at n=20A261791a(1) = 15; for n > 1, a(n)^2 is the smallest square that begins with a(n-1) in base 6.at n=24A336251