-872
domain: Z
Appears in sequences
- E.g.f.: log(sech(x)+sinh(x))=x-2/2!*x^2+6/3!*x^3-20/4!*x^4+120/5!*x^5...at n=6A013206
- Expansion of Product_{m>=1} (1-m*q^m)^20.at n=10A022680
- a(n+1) = a(n) - n (if n is odd), a(n+1) = a(n) * n (if n is even).at n=8A047906
- Expansion of (1 - x)/(1 + x - 2*x^2 + x^3).at n=9A078039
- Expansion of (1-x)/(1+x+x^2-2*x^3).at n=16A078045
- Net gain in number of ON cells at stage n of the cellular automaton described in A079317.at n=45A151921
- Net gain in number of ON cells at stage n of the cellular automaton described in A079317.at n=47A151921
- Coefficients of polynomials H(n,x) associated with squares of polynomials S(n,x).at n=23A154305
- Coefficients of polynomials H(n,x) associated with squares of polynomials S(n,x).at n=27A154305
- G.f.: 1/(1+x+x^3).at n=19A199804
- First differences of A160239.at n=23A245543
- Row sums of triangle A274659.at n=34A273166
- Expansion of Product_{k>=0} (1-x^(5*k+1))^(5*k+1).at n=28A285071
- G.f. A(x) satisfies A(x) = 1 + x/A(-x*A(x)^2)^2.at n=8A384895
- Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A384895.at n=53A384900