

A246841


Sum of digits of all the antidivisors of n.


1



0, 0, 2, 3, 5, 4, 10, 8, 8, 14, 12, 13, 19, 16, 9, 5, 19, 19, 9, 15, 13, 27, 25, 14, 21, 15, 24, 28, 15, 9, 24, 31, 21, 12, 16, 14, 23, 34, 25, 28, 23, 30, 29, 22, 32, 22, 24, 20, 27, 26, 15, 40, 34, 16, 20, 20, 29, 42, 45, 35, 12, 24, 40, 10, 21, 32, 60, 49
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OFFSET

1,3


COMMENTS

Sum of the digits of the terms in row n of A130799.
First occurrence of k, or 0 if k never appears: 0, 3, 4, 6, 5, 0, 0, 8, 15, 7, 0, 11, 12, 10, 20, 14, 75, 69, 13, 48, 25, 44, 37, 27, 23, 50, 22, 28, 43, 42, 32, 45, 92, 38, 60, 82, 208, 81, 110, 52, 72, 58, 97, 73, 59, 77, 255, 85, 68, 127, ...


LINKS

Paolo P. Lava, Table of n, a(n) for n = 1..1000


EXAMPLE

Antidivisors of 20 are 3, 8, 13 and the sum of their digits is 3 + 8 + 1 + 3 = 15.


MAPLE

# function antidivisors defined in A066272. transforms is https://oeis.org/transforms.txt
read("transforms");
A246841 := proc(n)
a :=0 ;
for adiv in antidivisors(n) do
a := a+digsum(adiv) ;
end do:
a ;
end proc:
seq(A246841(n), n=1..30) ; # R. J. Mathar, Sep 07 2014


CROSSREFS

Cf. A034690, A066272.
Sequence in context: A064360 A075158 A215526 * A066417 A254669 A227913
Adjacent sequences: A246838 A246839 A246840 * A246842 A246843 A246844


KEYWORD

nonn,base,less


AUTHOR

Paolo P. Lava, Sep 05 2014


STATUS

approved



