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 A259303 Numbers n such that there exists an x!=n that makes {x,x,n} an amicable multiset. 10
 1560, 7380, 20448, 20664, 22752, 23352, 25248, 26964, 35328, 51360, 100200, 104412, 108792, 135540, 156312, 192096, 232740, 252252, 278460, 310752, 362160, 401688, 492660, 543456, 548592, 588744, 659736, 732060, 767520, 826848, 998712, 999648, 1129440, 1129464 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS We call the multiset {x,x,n} amicable iff sigma(x)=sigma(n)=x+x+n. For the x values, see A259302. If the condition x!=n were dropped, the terms from A005820 would also belong here. LINKS John Cerkan, Table of n, a(n) for n = 1..1742 PROG (PARI) isOK(n) = x=(sigma(n)-n)/2; x>0 && x!=n && denominator(x)==1 && sigma(x)==x+x+n; CROSSREFS Cf. A005820, A259307, A259302, A259304, A259305, A259306, A125490. Sequence in context: A092001 A069475 A158773 * A035865 A031800 A280354 Adjacent sequences: A259300 A259301 A259302 * A259304 A259305 A259306 KEYWORD nonn AUTHOR Jeppe Stig Nielsen, Jun 23 2015 STATUS approved

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Last modified April 2 01:40 EDT 2023. Contains 361723 sequences. (Running on oeis4.)