110469domain: NAppears in sequencesa(n) is the number of compositions of n in which the maximal part is 3.at n=20A000100Triangular array with the first half of the odd-indexed rows of A048004.at n=47A125105Denominators of r-Egyptian fraction expansion for golden ratio - 1, where r(k) = 1/Fibonacci(k+1).at n=4A270398