-403

Appears in sequences

• E.g.f.: Expansion of exp(tanh(tanh(x))).at n=7A009261
• Matrix 10th power of inverse partition triangle A038498.at n=37A050313
• Riordan array (1/(1+x), x(1-x)/(1+x)^2).at n=32A110511
• Expansion of (3+8*x-3*x^2-2*x^3)/((x^2+4*x+1)*(x^2-2*x-1)).at n=4A111639
• Triangular sequence from the characteristic polynomials of the SL(n,Z)/ determinants {1,-1} type triantidiagonal 2 center with one upper, -1 side antidiagonal above and below: M(3)={{0, -1, 1}, {-1, 2, -1}, {2, -1, 0}}.at n=59A124022
• Numerator of Laguerre(n, 8).at n=8A160635
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of min{2i+j-2,2j+i-2} (A204006).at n=37A204007
• Expansion of psi(x^3)^3 / (psi(x)^2 * psi(x^2)) in powers of x where psi() is a Ramanujan theta function.at n=23A262157
• Let f(x) = 1 + Sum_{j>=4} (|mu(j)| - |mu(j-1)|)*x^j, where mu(n) is the Möbius function (A008683). Then a(n) is n times the coefficient of x^n in the expansion of log(f(x)).at n=26A262400
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 429", based on the 5-celled von Neumann neighborhood.at n=11A272114
• Expansion of e.g.f. tanh(x*tan(x/2)) (even powers only).at n=4A296853
• Numerators of Hurwitz inverse of primes [2,3,5,7,...].at n=6A302191