-215

Appears in sequences

• Coefficients of the '2nd-order' mock theta function mu(q).at n=49A006306
• Numerators of coefficients in Taylor series expansion of exp(cosec(x)-cotanh(x)).at n=4A013536
• Numerator of [x^(2n)] in the Taylor expansion cosh(cosec(x)-coth(x))=1 +x^2/72 -215*x^4/31104 +199159*x^6/235146240-...at n=2A013546
• a(n) = 1 - n^3.at n=6A024001
• a(n) = 2^n - n^3.at n=7A024013
• Matrix inverse of triangle A055898.at n=41A055905
• Start with 1, add the next number if one gets a prime then add the next number else subtract the next...at n=25A074170
• Expansion of (1-x)/(1 + x + x^2 - x^3).at n=18A078046
• Signed triangle of D'Arcais numbers (A008298) : coefficients of r in the polynomials generated by the series coefficients of z^n in Product[(1-z^k)^r, {k,1,Inf}]*(n!).at n=18A078521
• Sum at 45 degrees to horizontal in triangle of A081498.at n=29A081499
• Integer coefficients of a power series A(x) such that A(x)^3 = A083349(x).at n=11A083350
• Expansion of chi(x) / phi(x^2) in powers of x where phi(), chi() are Ramanujan theta functions.at n=18A085261
• Inverse binomial transform of A003418.at n=6A100443
• Triangle read by rows giving the coefficients of general sum formulas of n-th Subfactorial numbers (A000166). The k-th row (k>=1) contains T(i,k) for i=1 to 2*k-1, where T(i,k) satisfies Subf(n) = Sum_{k=1..n} Sum_{i=1..2*k-1} T(i,k) * C(n-k,i-1) * n^(n-k).at n=12A101560
• Expansion of x*(1+2*x)/(1+x+x^2-2*x^3).at n=14A103749
• Expansion of eta(q)^5 / eta(q^5) in powers of q.at n=49A109064
• Expansion of x^2*(-3+4*x)/(1-x^3+x^4).at n=35A110061
• Expansion of psi(x)^5 / psi(x^5) - 25*x^2 * psi(x) * psi(x^5)^3 in powers of x where psi() is a Ramanujan theta function.at n=32A113259
• Matrix inverse of triangle A122177, where A122177(n,k) = C( k*(k+1)/2 + n-k + 2, n-k) for n>=k>=0.at n=17A121437
• Expansion of Product_{n >= 1} (1+q^(2*n-1))/((1-q^(4*n))*(1+q^(4*n-2))).at n=35A144558