A024746 Binomial coefficients: C(n,k), 2 <= k <= n-2, sorted.

6, 10, 10, 15, 15, 20, 21, 21, 28, 28, 35, 35, 36, 36, 45, 45, 55, 55, 56, 56, 66, 66, 70, 78, 78, 84, 84, 91, 91, 105, 105, 120, 120, 120, 120, 126, 126, 136, 136, 153, 153, 165, 165, 171, 171, 190, 190, 210, 210, 210, 210, 220, 220, 231, 231, 252, 253, 253, 276, 276, 286

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Crossrefs

Cf. A006987.

Formula

Sum_{n=1}^{infinity} 1/a(n) = 3/2. - Franklin T. Adams-Watters, Feb 28 2006