140274

Appears in sequences

• a(n) = sum of the products of taking n-1 numbers from the next n numbers. The next n numbers can be grouped like this (1), (2,3), (4,5,6), (7,8,9,10),... and a(n) is the (sum of the reciprocals of all members) multiplied by (the product of all members).at n=4A080473
• Fifth right hand column of triangle A165674.at n=10A165677
• (n-1)-st elementary symmetric function of {11, 12, 13, 14, ..., 10 + n}.at n=4A203147
• a(n) = (3*n)!/(2*n)! * Sum_{k=1..n} 1/(2*n+k).at n=4A384136