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

1,1

Comments

Partial sums of A068094.

Links

Table of n, a(n) for n=1..24.

Formula

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

Crossrefs

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

Sequence in context: A209296 A193041 A058407 * A136520 A212416 A058934

Adjacent sequences: A095860 A095861 A095862 * A095864 A095865 A095866

Keyword

base,easy,nonn

Author

Ray Chandler, Jun 28 2004

Status

approved