

A057709


Numbers n such that there is a unique x for which the sum of the aliquot parts of x (A005114) is n.


4



3, 4, 7, 9, 10, 11, 12, 18, 24, 26, 28, 30, 34, 36, 38, 39, 48, 56, 58, 60, 66, 68, 70, 72, 78, 80, 82, 84, 86, 94, 98, 102, 112, 116, 118, 122, 126, 128, 132, 138, 142, 144, 158, 160, 164, 168, 172, 174, 178, 180, 190, 192, 204, 208, 212, 220, 222, 224, 228, 250
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OFFSET

1,1


LINKS

T. D. Noe, Table of n, a(n) for n=1..1000
Eric Weisstein's World of Mathematics, Restricted Divisor Function.
Eric Weisstein's World of Mathematics, Aliquot Sequence.


EXAMPLE

12 is a member of the sequence because s(121)=12 (and because no other integer x satisfies s(x)=12).
18 is included because the sum of aliquot parts of 289 = 1+17 = 18, this being the only number with this property. 6 is not included because the sum of aliquot parts of 6 = 1+2+3=6 and the sum of aliquot parts of 25 = 1+5 = 6


CROSSREFS

Cf. A001065, A005114, A048138.
Sequence in context: A010444 A010398 A010435 * A139442 A037988 A213508
Adjacent sequences: A057706 A057707 A057708 * A057710 A057711 A057712


KEYWORD

nonn


AUTHOR

Jack Brennen, Oct 24 2000


EXTENSIONS

Removed 1 from the sequence.  T. D. Noe, Dec 02 2008


STATUS

approved



