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A169890 Carryless sum 1+2+3+...+n. 4
0, 1, 3, 6, 0, 5, 1, 8, 6, 5, 15, 26, 38, 41, 55, 60, 76, 83, 91, 0, 20, 41, 63, 86, 0, 25, 41, 68, 86, 5, 35, 66, 98, 21, 55, 80, 16, 43, 71, 0, 40, 81, 23, 66, 0, 45, 81, 28, 66, 5, 55, 6, 58, 1, 55, 0, 56, 3, 51, 0, 60, 21, 83, 46, 0, 65, 21, 88, 46, 5, 75, 46, 18, 81, 55, 20, 96, 63, 31 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Carryless analog of triangular numbers.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 0..9999

David Applegate, Marc LeBrun and N. J. A. Sloane, Carryless Arithmetic (I): The Mod 10 Version.

Index entries for sequences related to carryless arithmetic

CROSSREFS

Cf. A004250, A059729.

Sequence in context: A278488 A038023 A008954 * A181907 A141703 A283193

Adjacent sequences:  A169887 A169888 A169889 * A169891 A169892 A169893

KEYWORD

nonn,base,look

AUTHOR

David Applegate, Marc LeBrun and N. J. A. Sloane, Jul 06 2010

STATUS

approved

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Last modified February 27 11:38 EST 2021. Contains 341656 sequences. (Running on oeis4.)