A169892 - OEIS

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A169892

Ordinary 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}.

2

1, 3, 4, 7, 19, 22, 8, 49, 20, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 76, 22, 82, 24, 88, 26, 121, 28, 129, 30, 44, 52, 50, 48, 56, 54, 52, 60, 58, 56, 277, 72, 303, 80, 299, 78, 362, 76, 360, 84, 1415, 52, 53, 108, 114, 1614, 175, 178, 240, 240, 1030, 150, 1094, 144, 1108

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OFFSET

1,2

COMMENTS

Counted with multiplicity.

LINKS

Table of n, a(n) for n=1..64.

Index entries for sequences related to carryless arithmetic

CROSSREFS

Cf. A000203, A169891, A169893, A169987-A169899.

Sequence in context: A041497 A042227 A117789 * A246805 A241660 A338452

Adjacent sequences: A169889 A169890 A169891 * A169893 A169894 A169895

KEYWORD

nonn,base

AUTHOR

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

STATUS

approved