18416
domain: N
Appears in sequences
- Larger of amicable pair.at n=7A002046
- Symmetries in unrooted (1,3) trees on 2n vertices.at n=12A003610
- Number of sensed 2-connected simple planar maps with n edges.at n=10A006406
- Coordination sequence for MgZn2, Position Zn2.at n=34A009938
- Number of 4-ary rooted trees with n nodes and height at most 5.at n=16A036610
- Greater of amicable pairs of Euler's first form with GCD a power of 2.at n=1A049024
- Amicable numbers.at n=15A063990
- a(n) = 512*n - 16.at n=35A157447
- a(n) = (n^3 + 4*n^2 - n)/2.at n=31A162260
- Largest members of k-sociable cycles of order r.at n=14A183013
- Conjectured list of multisociable numbers.at n=26A183019
- Numbers k such that sigma(k) = sigma(sigma(k)-k).at n=19A206708
- Number of (w,x,y,z) with all terms in {1,...,n} and min{|w-x|,|w-y|}=min{|x-y|,|x-z|}.at n=22A212579
- Deficient numbers whose aliquot sequence is deficient, abundant, deficient, ..., etc.at n=13A234970
- Let us denote 's' the sum of the deficient numbers in the aliquot parts of x. Sequence lists numbers x such that sigma(s)-s is equal to x.at n=16A254879
- Numbers that belong to at least one amicable tuple.at n=22A255215
- Amicable pairs.at n=15A259180
- Numbers that belong to at least one amicable multiset.at n=32A259307
- Amicable pairs (x < y) ordered by nondecreasing sum (x + y) and then by increasing x.at n=15A259933
- Larger of amicable pair (x, y) as they are listed in A259933.at n=7A260087