67678791domain: NAppears in sequencesa(n) = A118443(n)/(n+1), where A118443 is the row sums of triangle A118441.at n=23A118444Numerator of imaginary part of (3*i - 1)^(-n).at n=23A124871a(n) = 2*a(n-1) - 5*a(n-2), with a(1) = -1, a(2) = -7.at n=22A138749