125082

Appears in sequences

• Numerators of continued fraction convergents to sqrt(211).at n=10A041392
• Expansion of -x^2*(19440*x^4+2160*x^3-2304*x^2-150*x+55) /((3*x+1)*(6*x-1)*(6*x+1)*(15*x-1)*(12*x^2-1)).at n=4A138053
• Expansion of x/((1-x-x^3)*(1-x)^3).at n=24A226405
• a(n) is the number of five element sets of distinct integer-sided trapezoids whose base angles are 60 degrees that fill an equilateral triangular grid of side n units.at n=30A391498