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A273259 Twin amicable numbers (m,n) where there is not any part of another amicable pair between m and n. 1
220, 284, 1184, 1210, 2620, 2924, 5020, 5564, 6232, 6368, 10744, 10856, 12285, 14595, 17296, 18416, 66928, 66992, 122368, 123152, 196724, 202444, 437456, 455344, 469028, 486178, 503056, 514736, 522405, 525915, 643336, 652664, 802725, 863835, 998104, 1043096, 1077890, 1099390 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The sequence lists the twin amicable number pairs in increasing order. So opposite to the list of the amicable numbers, the pairs (m, n) are necessarily adjacent to each other in this list.
First differs from A259933 at a(19). - Omar E. Pol, May 19 2016
REFERENCES
Song Y. Yan, Perfect, Amicable and Sociable Numbers, World Scientific Pub Co Inc, 1996, pp. 113-121.
LINKS
Eric Weisstein's World of Mathematics, Amicable Pair
EXAMPLE
The (63020, 76084) amicable pair does not qualify since it overlaps with the (66928, 66992) pair.
On the other hand, 66928 and 66992 are contiguous, thus the (66928, 66992) amicable pair belongs to the sequence.
CROSSREFS
Cf. A002025 (smaller), A002046 (and larger of an amicable pair).
Cf. A063990 (amicable numbers), A259180 (amicable pairs), A259933.
Sequence in context: A063990 A259180 A259933 * A262624 A262622 A287026
KEYWORD
nonn
AUTHOR
Zoltan Galantai, May 18 2016
STATUS
approved

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Last modified March 28 13:21 EDT 2024. Contains 371254 sequences. (Running on oeis4.)