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A294927 Number of proper divisors of n that are nondeficient (A023196). 6
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 3, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 2, 0, 1, 0, 0, 0, 4, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 0, 4, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 4, 0, 0, 0, 1, 0, 1, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,24

LINKS

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

FORMULA

a(n) = Sum_{d|n, d<n} A294936(d).

a(n) + A294926(n) = A032741(n).

PROG

(PARI) A294927(n) = sumdiv(n, d, (d<n)*(sigma(d)>=(2*d)));

CROSSREFS

Cf. A023196, A032741, A071395, A294887, A294926, A294928, A294929, A294936.

Sequence in context: A122841 A060862 A066087 * A080224 A261488 A010105

Adjacent sequences:  A294924 A294925 A294926 * A294928 A294929 A294930

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 14 2017

STATUS

approved

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Last modified November 19 08:57 EST 2018. Contains 317348 sequences. (Running on oeis4.)