-3

Appears in sequences

• Coefficients of the 3rd-order mock theta function f(q).at n=4A000025
• Coefficient of q^(2n) in the series expansion of Ramanujan's mock theta function f(q).at n=2A000039
• Nearest integer to tan n.at n=71A000209
• Nearest integer to tan n.at n=27A000209
• Nearest integer to tan n.at n=49A000209
• Nearest integer to tan n.at n=5A000209
• a(n) = floor(b(n)), where b(n) = tan(b(n-1)), b(0)=1.at n=38A000319
• a(n) = floor(b(n)), where b(n) = tan(b(n-1)), b(0)=1.at n=5A000319
• a(n) = floor(b(n)), where b(n) = tan(b(n-1)), b(0)=1.at n=58A000319
• a(n) = floor(b(n)), where b(n) = tan(b(n-1)), b(0)=1.at n=80A000319
• a(n) = floor(tan(n)).at n=68A000503
• a(n) = floor(tan(n)).at n=46A000503
• a(n) = floor(tan(n)).at n=24A000503
• a(n) = floor(tan(n)).at n=93A000503
• a(n) = floor(tan(n)).at n=2A000503
• Expansion of bracket function.at n=1A000748
• a(n) = a(n-1)*a(n-2) - 1.at n=5A001054
• Canonical enumeration of integers: interleaved positive and negative integers with zero prepended.at n=6A001057
• Genocchi numbers (of first kind); unsigned coefficients give expansion of x*tan(x/2).at n=2A001469
• The negative integers.at n=2A001478