-4

Appears in sequences

• a(n) = floor(b(n)), where b(n) = tan(b(n-1)), b(0)=1.at n=48A000319
• Nearest integer to b(n), where b(n) = tan(b(n-1)), b(0) = 1.at n=48A000329
• a(n) = floor(tan(n)).at n=5A000503
• a(n) = floor(tan(n)).at n=49A000503
• a(n) = floor(tan(n)).at n=27A000503
• a(n) = floor(tan(n)).at n=71A000503
• Expansion of Product_{k >= 1} (1 - x^k)^4.at n=1A000727
• Expansion of Product_{k >= 1} (1 - x^k)^4.at n=25A000727
• Expansion of Product_{k >= 1} (1 - x^k)^4.at n=5A000727
• Expansion of Product_{k >= 1} (1 - x^k)^4.at n=61A000727
• Expansion of Product_{k >= 1} (1 - x^k)^4.at n=13A000727
• a(n) = a(n-1)*a(n-2) - 1.at n=6A001054
• Canonical enumeration of integers: interleaved positive and negative integers with zero prepended.at n=8A001057
• a(n) = Bernoulli(2*n) * (2*n + 1)!.at n=2A001332
• The negative integers.at n=3A001478
• Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^4 in powers of x.at n=3A001482
• Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^4 in powers of x.at n=1A001482
• a(n) = -n.at n=4A001489
• Expansion of k/(4*q^(1/2)) in powers of q, where k defined by sqrt(k) = theta_2(0, q)/theta_3(0, q).at n=1A001938
• Expansion of Product_{k>=1} (1 - x^k)^2.at n=40A002107