19869

Appears in sequences

• Numbers k where cos(k) decreases monotonically to 0.at n=31A046957
• Numbers k where sin(k) increases monotonically to 1 (or cosec(k) decreases).at n=35A046959
• Row sums of the triangle A097883.at n=33A098404
• Number of nondecreasing -n..n vectors of length 4 whose dot product with some other -n..n vector equals 4.at n=11A226343
• Fundamental discriminants d uniquely characterizing all complex biquadratic fields Q(sqrt(-3),sqrt(d)) which have 3-class group of type (3,3) and second 3-class group isomorphic to SmallGroup(729,95).at n=9A250239
• Indices of primes in A026007.at n=45A285223
• "Word binomial coefficient" for (x|y) where y is the first n symbols of the Thue-Morse sequence (A010060) and x is the first 2n symbols.at n=15A323598