166230

Appears in sequences

• Number of equilateral triangles formed out of matches that can be found in a hexagonal chunk of side length n in hexagonal array of matchsticks.at n=36A045949
• Number of primes == 3 (mod 10) less than 10^n.at n=6A073506
• Expansion of x^3 / (1 - x - 5*x^2 - x^3 + x^4).at n=15A129113
• Number of reduced words of length n in the Weyl group B_27.at n=5A161954
• Number of reduced words of length n in the Weyl group D_27.at n=5A162369
• Frequency of the most common final digit of a prime < 10^n.at n=6A244265