-216
domain: Z
Appears in sequences
- Expansion of e.g.f. cos(tan(x))/cos(x), even-indexed terms only.at n=3A009072
- Expansion of e.g.f. cos(tan(x))/exp(x).at n=6A009074
- Expansion of e.g.f.: cosh(x)*cos(tan(x)).at n=3A009176
- Expansion of e.g.f.: exp(x)/cosh(tanh(x)).at n=6A009298
- Specific heat coefficients for square lattice spin 3/2 Ising model.at n=6A010113
- a(n) = 3^n - n^5.at n=3A024028
- Inverse Euler transform of {A001285(0), A001285(1), ...} where A001285(n) is Thue-Morse sequence.at n=31A029878
- Column 2 of Inverse partition triangle A038498.at n=59A039801
- Triangle inverse to that in A046899.at n=19A046900
- Fourier coefficients of T_{16}.at n=1A048100
- Regard triangle of rencontres numbers (see A008290) as infinite matrix, compute inverse, read by rows.at n=47A055137
- Matrix inverse of triangle A055277(n+1,k).at n=60A055288
- Image of Euler totient function (A000010) under "little Hankel" transform that sends [c_0, c_1, ...] to [d_0, d_1, ...] where d_n = c_n^2 - c_{n+1}*c_{n-1}.at n=24A056228
- McKay-Thompson series of class 44a for Monster.at n=23A058680
- Triangle of numbers obtained by inverting infinite matrix defined in A059369, read from right to left.at n=33A059370
- Expansion of (1-x-x^N)/((1-x)(1-x^2)(1-x^3)...(1-x^N)) for N = 3.at n=52A060022
- Expansion of a Schwarzian ({f_{27|3}, tau} / (4*Pi)^2) in powers of q^3.at n=2A062248
- Determinant of n X n matrix whose rows are cyclic permutations of 4..Composite(n).at n=2A066917
- Expansion of (1-x)^(-1)/(1+x+x^2-2*x^3).at n=13A077907
- Row 9 of array in A288580.at n=12A092974