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A294926 Number of proper divisors of n that are deficient (A005100). 6
0, 1, 1, 2, 1, 3, 1, 3, 2, 3, 1, 4, 1, 3, 3, 4, 1, 4, 1, 5, 3, 3, 1, 5, 2, 3, 3, 5, 1, 6, 1, 5, 3, 3, 3, 5, 1, 3, 3, 6, 1, 6, 1, 5, 5, 3, 1, 6, 2, 5, 3, 5, 1, 5, 3, 6, 3, 3, 1, 7, 1, 3, 5, 6, 3, 6, 1, 5, 3, 7, 1, 6, 1, 3, 5, 5, 3, 6, 1, 7, 4, 3, 1, 7, 3, 3, 3, 7, 1, 8, 3, 5, 3, 3, 3, 7, 1, 5, 5, 7, 1, 6, 1, 7, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..20000

FORMULA

a(n) = Sum_{d|n, d<n} A294934(d).

a(n) = A080226(n) - A294934(n).

a(n) + A294927(n) = A032741(n).

PROG

(PARI) A294926(n) = sumdiv(n, d, (d<n)*(sigma(d)<(2*d))); \\ Antti Karttunen, Nov 14 2017

CROSSREFS

Cf. A032741, A080226, A294886, A294927, A294928, A294929, A294934.

Sequence in context: A329616 A304795 A036459 * A079167 A304793 A199570

Adjacent sequences:  A294923 A294924 A294925 * A294927 A294928 A294929

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 14 2017

STATUS

approved

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Last modified August 3 21:13 EDT 2021. Contains 346441 sequences. (Running on oeis4.)