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• Hosoya's triangle, based on the Fibonacci numberscite-ref-5[5]

• Lozanić's triangle, used in the mathematics of chemical compoundscite-ref-6[6]

• Narayana triangle, counting strings of balanced parentheses with a given number of distinct nestingscite-ref-7[7]

• Pascal's triangle, whose entries are the binomial coefficientscite-ref-8[8]

Triangular arrays of integers in which each row is symmetric and begins and ends with 1 are sometimes called generalized Pascal triangles; examples include Pascal's triangle, the Narayana numbers, and the triangle of Eulerian numbers.cite-ref-9[9]

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