1149819domain: NAppears in sequencesa(n) = b(n) - c(n) where b(n) is the n-th Lucas number greater than 3 and c(n) is the n-th number not in sequence b( ).at n=26A014252Expansion of 1/sqrt( (1-x) * (1-x-4*x^4) ).at n=29A383355