21299

Appears in sequences

• Number of lines through at least 2 points of a 9 X n grid of points.at n=34A160849
• Expansion of Product_{k>=1} 1/(1 - x^k)^(k*(3*k+1)/2).at n=9A294667
• Numerator of the sum of the reciprocals of all square divisors of all positive integers <= n.at n=32A384817
• a(n) = numerator(Sum_{k=1..n} d(k+1)/d(k)), where d is the number of divisors function.at n=41A386925