The Narayana triangle is the number triangle obtained from the Narayana numbers N(n, k), namely 1 | | | | | 1 | 1 | | | | 1 | 3 | 1 | | | 1 | 6 | 6 | 1 | | 1 | 10 | 20 | 10 | 1 | 1 | 15 | 50 | 50 | 15 | 1 (OEIS A001263).