19245

Appears in sequences

• Expansion of a modular function for Gamma_0(21).at n=22A002511
• Integer part of square root of the reciprocal of a number multiplied by 10 to the power of the integer part of the square root of the number.at n=26A089245
• Numbers n such that 6n and 12n are both the average of twin prime pairs.at n=30A177680
• Number of partitions of n having standard deviation σ > 4.at n=42A238656
• Number of different positions in which a square with side length k, 1 <= k <= n - floor(n/3), can be placed within a bi-symmetric triangle of 1 X 1 squares of height n.at n=42A241526
• Numbers k such that k!4 + 2^10 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).at n=30A291351
• Triangle read by rows: T(n,k) is the number of unoriented series-parallel networks whose multigraph has n edges and k interior vertices, 0 <= k < n.at n=61A339285