A169893 Carryless sum of {numbers i in the range 1 <= i <= n such that there is a number j in the range 1 <= j <= n for which the carryless product i*j equals n}.

1, 3, 4, 7, 9, 2, 8, 9, 0, 11, 12, 13, 14, 15, 16, 17, 18, 19, 10, 66, 22, 62, 24, 68, 26, 81, 28, 89, 20, 44, 42, 40, 48, 46, 44, 42, 40, 48, 46, 27, 62, 23, 60, 29, 68, 62, 66, 60, 64, 55, 52, 53, 8, 4, 54, 55, 58, 0, 0, 20, 20, 24, 24, 28, 28, 89, 22, 85, 26, 88, 82, 86, 80, 84, 88, 82

Offset

1,2

Comments

Counted with multiplicity.

Links

Table of n, a(n) for n=1..76.

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. A000203, A169891, A169892, A169987-A169899.

Sequence in context: A215110 A101715 A249751 * A169899 A328040 A075773

Adjacent sequences: A169890 A169891 A169892 * A169894 A169895 A169896

Keyword

nonn,base

Author

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

Status

approved