51755domain: NAppears in sequencesa(n+1)=a(n)+a(n-1) if a(n-1) odd, a(n+1)=a(n)+a(n-1)/2 if a(n-1) even.at n=26A078696Chebyshev polynomials S(n,227) + S(n-1,227) with Diophantine property.at n=2A098246Number of Lyndon compositions of n that are not weakly increasing.at n=19A329141