A094946 a(n) is 10110(3 1's)0...0(n 1's).

1, 1011, 10110111, 1011011101111, 1011011101111011111, 10110111011110111110111111, 1011011101111011111011111101111111, 1011011101111011111011111101111111011111111

Offset: 0

Author

Paul Barry, May 25 2004

Keywords

• easy
• nonn
• base

Comments

Sum of n-th term digits is C(n+2,2).

Crossrefs

Cf. A023532.

Formula

a(n) = A094945((n+1)(n+2)/2+n)

a(n) = a(n-1)*10^(n+1) + (10^n-1)/9. Franklin T. Adams-Watters, Aug 21 2013

Extensions

Name changed by Franklin T. Adams-Watters, Aug 21 2013