-805

Appears in sequences

• Generalized sum of divisors function.at n=26A002130
• Expansion of (1 - x)^(-1)/(1 + 2*x - 2*x^2 + x^3).at n=7A077918
• Expansion of 1/(1-2*x+x^2+x^3).at n=17A077941
• Expansion of 1/(1+x^2+x^3).at n=37A077962
• Expansion of (1-x)/(1 + x^2 - x^3).at n=35A078031
• Triangle T, read by rows, equal to the matrix product T = H*[C^-1]*H, where H is the self-inverse triangle A118433 and C is Pascal's triangle.at n=31A118435
• a(n) = A062295(n) - A133743(n).at n=31A133744
• Triangle read by rows, T[n,2i-1]=2T[n-1,i],T[n,2i]=2k-1-2T[n-1,i].at n=58A138583
• Hankel transform of expansion of 1/c(x)^3, c(x) the g.f. of A000108.at n=12A144701
• Expansion of (1+4*x+x^2) / ((1-x)^3*(1+x)^4).at n=26A229834
• G.f.: x^((k^2+k)/2)/(mul(1-x^i,i=1..k)*mul(1+x^r,r=1..oo)) with k = 3.at n=75A246582
• Expansion of f(-q^2, -q^5)^3 / (f(-q^1, -q^6) * f(-q^3, -q^4)^2) in powers of q where f(, ) is Ramanujan's general theta function.at n=34A262933
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 278", based on the 5-celled von Neumann neighborhood.at n=29A271098
• L.g.f.: log(1 + Sum_{k>=1} prime(k)*x^k) = Sum_{n>=1} a(n)*x^n/n.at n=17A303073
• Expansion of q * f(-q^1, -q^6)^3 / f(-q^2, -q^5)^2 * f(-q^3, -q^4) in powers of q where f() is Ramanujan's two-variable theta function.at n=33A305443
• Fluctuations of the number of biquadrate integers not exceeding 10^n.at n=27A375247