A068134 Index of the smallest triangular number with digit sum = n-th triangular number.

0, 1, 2, 3, 7, 12, 56, 109, 368, 1332, 5656, 28248, 140547, 774325, 8485151, 34339452, 397492132, 3996973827, 63229707890, 1039037824132

Offset

0,3

Links

Table of n, a(n) for n=0..19.

Crossrefs

Cf. A068133.

Sequence in context: A056294 A084423 A361910 * A249051 A329413 A225093

Adjacent sequences: A068131 A068132 A068133 * A068135 A068136 A068137

Keyword

base,more,nonn

Author

Amarnath Murthy, Feb 21 2002

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Jun 17 2002

a(18), a(19) from Max Alekseyev, Jun 19 2011

a(0)=0 inserted by Sean A. Irvine, Jan 29 2024

Status

approved