260515

Appears in sequences

• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite LIO = Liottite (Ca,Na2,K2)9[Al18Si18O72] starting with a T1 atom.at n=7A019027
• Least positive integer multiples of angle x such that their direction cosines form a unit vector: Sum_{k>0} cos(a(k)*x)^2 = 1, where a(1)=1 and x=1.at n=24A080136
• Least positive integer multiples of angle x such that their direction cosines form a unit vector: Sum_{k>0} cos(a(k)*x)^2 = 1, where a(1)=1 and x=3.at n=20A080138
• Integers n with tan n > |n|, ordered by |n|.at n=5A088306
• Numerators of convergents to Pi/2.at n=8A096456
• Numbers n for which tan(n) > n.at n=1A249836
• Numbers k for which sec(k) > k.at n=3A337248
• Nonnegative integers k such that k < sec(k)*csc(k).at n=12A342171
• a(n) is the smallest integer k > 0 such that 10^(-n-1) < |sin(k) - round(sin(k))| < 10^(-n).at n=11A346033
• Numbers k such that A381781(k) is negative.at n=1A381892
• Numbers k such that sin(k) > 1 - 1/k^2.at n=5A389816