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A074899 Triangular numbers written backwards and sorted, duplicates removed. 0
1, 3, 6, 12, 19, 21, 28, 36, 51, 54, 55, 63, 66, 82, 87, 91, 99, 102, 132, 147, 153, 165, 168, 171, 252, 307, 309, 351, 352, 379, 381, 417, 423, 451, 501, 505, 523, 534, 564, 577, 582, 594, 595, 604, 613, 627, 631, 645, 649, 654, 666, 672, 694, 753, 766, 771 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..56.

CROSSREFS

Cf. A004158.

Sequence in context: A341316 A298029 A327328 * A318872 A267591 A101423

Adjacent sequences:  A074896 A074897 A074898 * A074900 A074901 A074902

KEYWORD

base,nonn

AUTHOR

Jason Earls, Sep 14 2002

STATUS

approved

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Last modified May 14 13:48 EDT 2021. Contains 343884 sequences. (Running on oeis4.)