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A169891 Number 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. 5
1, 2, 2, 3, 5, 6, 2, 10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 8, 2, 8, 2, 8, 2, 10, 2, 10, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 18, 4, 18, 4, 18, 4, 20, 4, 20, 4, 50, 2, 2, 4, 4, 54, 6, 6, 8, 8, 36, 6, 36, 6, 36, 6, 38, 6, 38, 6, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 50, 8, 50, 8, 50, 8, 52, 8, 52, 8, 16 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Counted with multiplicity.

LINKS

Table of n, a(n) for n=1..90.

Index entries for sequences related to carryless arithmetic

CROSSREFS

Cf. A000005, A169892, A169893, A169987-A169899.

Sequence in context: A292802 A247376 A101779 * A137756 A333468 A225489

Adjacent sequences:  A169888 A169889 A169890 * A169892 A169893 A169894

KEYWORD

nonn,base

AUTHOR

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

STATUS

approved

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Last modified February 27 10:09 EST 2021. Contains 341649 sequences. (Running on oeis4.)