86558domain: NAppears in sequencesa(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-1)*a(1) for n >= 5, starting 1,1,1,0.at n=14A025274Numbers n such that reversal(n)=2*phi(n).at n=9A136538Number of compositions of n where differences between neighboring parts are in {-2,-1,1,2}.at n=28A214256