36141

Appears in sequences

• Nonprime numbers k such that the sum of the divisors of k^2 is of the form m^2 + m + 1.at n=35A289385
• Expansion of Product_{r = 1 or not a perfect power} 1/(1 - x^r).at n=48A305630
• One of the two successive approximations up to 5^n for 5-adic integer sqrt(6). This is the 1 (mod 5) case (except for n = 0).at n=7A324023
• a(n) is the number of 5 element sets of distinct integer-sided trapezoids whose base angles are 60 degrees that fill an equilateral triangular grid of side n units formed by directly binary space partitioning 3-trapezoid sets without forming 4-trapezoid sets.at n=43A391203