171856

Appears in sequences

• Smaller of an amicable pair: (a,b) such that sigma(a) = sigma(b) = a+b, a < b.at n=18A002025
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 67 ones.at n=14A031835
• Numbers k that divide the number of partitions of k into distinct parts (A000009).at n=26A056848
• Start with a single triangle; at n-th generation add a triangle at each vertex, allowing triangles to overlap; sequence gives total population of triangles at n-th generation.at n=26A061777
• Irregular triangle in which row n consists of the smaller of pairs of amicable numbers of the form 2^n pq, with p and q odd primes.at n=4A180650
• Conjectured list of smallest terms of k-sociable cycles of order r.at n=28A183016
• Smaller members of regular amicable pairs.at n=12A215491
• Abundant numbers whose aliquot sequence is abundant, deficient, abundant, ..., etc.at n=24A234969
• Amicable pairs.at n=36A259180
• Amicable pairs (x < y) ordered by nondecreasing sum (x + y) and then by increasing x.at n=36A259933
• Smaller of amicable pair (x, y) as they are listed in A259933.at n=18A260086
• Amicable pairs of even numbers.at n=26A262622
• Even amicable numbers.at n=26A262624
• Amicable pairs with the property that both members have the same number of divisors.at n=14A328064