123520

Appears in sequences

• a(n) = n * [1 + sum(k=1 to n) prime(k)].at n=40A083725
• Maximal coefficient of Product_{k=1..n} (1 + 2*x^k).at n=14A359389
• Expansion of 1 / sqrt((1-x)^4 - 4*x^3).at n=13A392640