login
A233626
Least member of an amicable n-tuple: (x[1],...,x[n]) such that sigma(x[1])=...=sigma(x[n])=x[1]+...+x[n], x[i]<x[i+1].
1
1, 220, 1980, 3270960, 53542288800
OFFSET
1,2
COMMENTS
Some authors use other definitions for amicable k-tuples, cf. link to MathWorld.
LINKS
Eric W. Weisstein, Amicable Triple. From MathWorld--A Wolfram Web Resource.
CROSSREFS
Cf. A002025, A002046 and A161005 for amicable pairs.
Cf. A125490 - A125492 and A137231 for amicable triples.
Cf. A036471 - A036474 and A116148 for amicable quadruples.
Cf. A233553 for amicable quintuples.
Sequence in context: A339682 A241615 A180219 * A251322 A257353 A211820
KEYWORD
nonn,hard,more
AUTHOR
M. F. Hasler, Dec 12 2013
STATUS
approved