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A091195 Number of numbers <= n having only one abundant divisor. 1
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,18

LINKS

Table of n, a(n) for n=1..97.

Eric Weisstein's World of Mathematics, Abundant Number

CROSSREFS

Cf. A091191, A091194, A005101.

Sequence in context: A156878 A214454 A140474 * A280617 A072375 A131981

Adjacent sequences:  A091192 A091193 A091194 * A091196 A091197 A091198

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 27 2003

STATUS

approved

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Last modified November 21 05:01 EST 2017. Contains 294988 sequences.