-7

Appears in sequences

• Nearest integer to tan n.at n=8A000209
• a(n) = floor(b(n)), where b(n) = tan(b(n-1)), b(0)=1.at n=87A000319
• a(n) = floor(tan(n)).at n=8A000503
• a(n) = floor(tan(n)).at n=30A000503
• a(n) = floor(tan(n)).at n=52A000503
• Expansion of Product_{n>=1} (1 - x^n)^7.at n=31A000730
• Expansion of Product_{n>=1} (1 - x^n)^7.at n=1A000730
• Expansion of Product_{n>=1} (1 - x^n)^7.at n=43A000730
• Canonical enumeration of integers: interleaved positive and negative integers with zero prepended.at n=14A001057
• The negative integers.at n=6A001478
• Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^7 in powers of x.at n=1A001485
• a(n) = -n.at n=7A001489
• a(n) = a(n-1) - (n-1)(n-2)a(n-2).at n=4A002019
• Coefficient of x^p (p = n-th prime) in x * Product_{k>=1} (1-x^k)^2*(1-x^11k)^2.at n=24A002070
• Coefficient of x^p (p = n-th prime) in x * Product_{k>=1} (1-x^k)^2*(1-x^11k)^2.at n=32A002070
• Coefficient of x^p (p = n-th prime) in x * Product_{k>=1} (1-x^k)^2*(1-x^11k)^2.at n=18A002070
• Coefficient of x^p (p = n-th prime) in x * Product_{k>=1} (1-x^k)^2*(1-x^11k)^2.at n=36A002070
• a(1) = 0, a(2) = -2; for n > 2, a(n) + a(n-2) - a(n-3) - a(n-5) - ... - a(n-p) = (-1)^(n+1)*n if n is prime, otherwise = 0, where p = largest prime < n.at n=11A002120
• Glaisher's chi numbers. a(n) = chi(4*n + 1).at n=12A002171
• Coefficients in the expansion of B^2*C^3 in Watson's notation of page 118.at n=46A002300