240840

Appears in sequences

• Generating function = Product_{m>=1} 1/(1 - x^m)^2; a(n) = number of partitions of n into parts of 2 kinds.at n=27A000712
• Number of partitions of 2*n + 1 into parts of two kinds.at n=13A100535
• Number of rhombi on an n X n grid (or geoboard).at n=30A189418
• Expansion of e.g.f. 1/(1 - Sum_{k>=1} d(k) * x^k / k), where d(n) = number of divisors of n (A000005).at n=7A353186