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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,... 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

CROSSREFS

Sequence in context: A317321 A080472 A118389 * A018855 A263277 A040428

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

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Last modified September 17 09:11 EDT 2019. Contains 327128 sequences. (Running on oeis4.)