A095863 Index of largest triangular number with n digits.

3, 13, 44, 140, 446, 1413, 4471, 14141, 44720, 141420, 447213, 1414213, 4472135, 14142135, 44721359, 141421355, 447213594, 1414213561, 4472135954, 14142135623, 44721359549, 141421356236, 447213595499, 1414213562372

Offset: 1

Author

Ray Chandler, Jun 28 2004

Keywords

• base
• easy
• nonn

Comments

Partial sums of A068094.

Crossrefs

Cf. A068092, A068093, A068094, A095864, A095865, A095866.

Formula

a(n) = A068092(n+1) - 1.