687808321212domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(140).at n=21A041256a(n) = 12*a(n-1) - a(n-2), with a(0) = 2 and a(1) = 12.at n=11A087800Sequences A087800 and A077416 interleaved.at n=22A164826a(n) = 2 * T(n,(n+1)/2) where T(n,x) is a Chebyshev polynomial of the first kind.at n=11A343260