201326567domain: NAppears in sequencesa(1) = 23, a(2) = 71, a(n) = 3*a(n-1) - 2*a(n-2) for n>2.at n=22A248877Values of f(2,x,y) in increasing order, for x>=0, y>0 where f is the Sudan function defined in A260002.at n=25A260004