153992264domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(68).at n=8A041118a(n) = 8*a(n-1) + a(n-2), starting with a(0)=2 and a(1)=8.at n=9A086594Continued cotangent recurrence a(n+1)=a(n)^3+3*a(n) and a(1)=8.at n=2A145182a(n) = n*(n^2 + 3)*(n^6 + 6*n^4 + 9*n^2 + 3).at n=8A261574