69203

Properties

Appears in sequences

• Pairs (x, y), x < y, of f-amicable numbers where f(k) = floor(|k*sin(k)|) sorted by increasing y, then increasing x; f-amicable numbers are defined in A066511.at n=15A066573
• Records for terms in the continued fraction of Catalan's constant.at n=11A099789
• Numerator of partial sums of a certain series. First member (m = 2) of a family.at n=6A101028
• Numerator of Sum_{k=1..n} (-1)^(k+1) * 1/(k*(k+1)).at n=13A125683
• Primes in A125683(n) in order of their occurrence.at n=8A125685
• Primes p of Erdos-Selfridge class 5+ with largest prime factor of p+1 not of class 4+.at n=12A129473
• Prime numbersat n=6873