-21

Appears in sequences

• Coefficients of the 3rd-order mock theta function f(q).at n=16A000025
• Coefficient of q^(2n) in the series expansion of Ramanujan's mock theta function f(q).at n=8A000039
• a(n) = floor(b(n)), where b(n) = tan(b(n-1)), b(0)=1.at n=86A000319
• Expansion of Product_{n>=1} (1 - x^n)^7.at n=11A000730
• Canonical enumeration of integers: interleaved positive and negative integers with zero prepended.at n=42A001057
• The negative integers.at n=20A001478
• Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^5 in powers of x.at n=20A001483
• a(n) = -n.at n=21A001489
• Coefficient of x^p (p = n-th prime) in x * Product_{k>=1} (1-x^k)^2*(1-x^11k)^2.at n=70A002070
• Numerators in expansion of sqrt(1+x). Absolute values give numerators in expansion of sqrt(1-x).at n=6A002596
• Power series expansion of the Rogers-Ramanujan continued fraction 1+x/(1+x^2/(1+x^3/(1+x^4/(1+...)))).at n=47A003823
• Coefficients of period polynomials.at n=2A006309
• Bond percolation series for directed cubic lattice.at n=3A006804
• Percolation series for directed square lattice.at n=5A006835
• a(n) = n! - n^3.at n=3A007339
• Triangle read by rows of Stirling numbers of first kind, s(n,k), n >= 1, 1 <= k <= n.at n=26A008275
• Triangle of Stirling numbers of first kind, s(n, n-k+1), n >= 1, 1 <= k <= n. Also triangle T(n,k) giving coefficients in expansion of n!*binomial(x,n)/x in powers of x.at n=22A008276
• Expansion of e.g.f.: exp(sin(x))*x.at n=7A009206
• Partition function coefficients for square lattice spin 2 Ising model.at n=32A010108
• Partition function coefficients for square lattice spin 5/2 Ising model.at n=40A010109