A169897 - OEIS

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A169897

Number of distinct 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.

0

1, 2, 2, 3, 3, 5, 2, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 6, 2, 6, 2, 7, 2, 7, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 13, 4, 13, 4, 13, 4, 14, 4, 14, 4, 26, 2, 2, 4, 4, 28, 6, 6, 8, 8, 22, 6, 22, 6, 22, 6, 23, 6, 23, 6, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 29, 8, 29, 8, 29, 8, 30, 8, 30, 8, 16, 16

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Counted without multiplicity.

LINKS

Table of n, a(n) for n=1..91.

Index entries for sequences related to carryless arithmetic

CROSSREFS

Cf. A000005, A169891-A169899.

Sequence in context: A113773 A060749 A138305 * A254309 A079375 A069933

Adjacent sequences: A169894 A169895 A169896 * A169898 A169899 A169900

KEYWORD

nonn,base

AUTHOR

David Applegate, Marc LeBrun and N. J. A. Sloane, Jul 11 2010

STATUS

approved