A077690 Rearrangement of triangular numbers such that the most significant digits follow the cyclic pattern 1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8,9,1,2,3,...

1, 21, 3, 45, 55, 6, 78, 820, 91, 10, 28, 36, 406, 528, 66, 703, 861, 903, 15, 210, 300, 435, 561, 630, 741, 8001, 946, 105, 231, 325, 465, 595, 666, 780, 8128, 990, 120, 253, 351, 496, 5050, 6105, 7021, 8256, 9045

Offset

1,2

Links

Table of n, a(n) for n=1..45.

Crossrefs

Sequence in context: A317321 A080472 A118389 * A018855 A349873 A372282

Adjacent sequences: A077687 A077688 A077689 * A077691 A077692 A077693

Keyword

base,nonn

Author

Amarnath Murthy, Nov 17 2002

Extensions

Corrected and extended by Michel ten Voorde Jun 20 2003

Status

approved