A074899 Triangular numbers written backwards and sorted, duplicates removed.

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

Offset

1,2

Links

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

Crossrefs

Cf. A004158.

Sequence in context: A327328 A356019 A363463 * A345868 A318872 A267591

Adjacent sequences: A074896 A074897 A074898 * A074900 A074901 A074902

Keyword

base,nonn

Author

Jason Earls, Sep 14 2002

Status

approved