-542

Appears in sequences

• Expansion of e.g.f.: sin(log(1+tan(x))).at n=7A009452
• a(n+1) = a(n) - a(floor(n/2)), with a(0)=0, a(1)=1.at n=55A062187
• Euler transform of negative integers.at n=28A073592
• Expansion of (1-x)/(1-x+2*x^2).at n=18A078020
• Expansion of (1 + x)/(1 + x + 2x^2).at n=18A110512
• Triangle read by rows, T[n,2i-1]=2T[n-1,i],T[n,2i]=2k-1-2T[n-1,i].at n=25A138583
• Expansion of eta(q) * eta(q^10)^3 / (eta(q^2) * eta(q^4) * eta(q^5) * eta(q^20)) in powers of q.at n=61A147702
• A triangle sequence from matrix polynomials of a three symbol type {0, 1, -1}: c(i,k)= Floor[Mod[i/2^k, 2]]; M(d)=Table[If[Sum[c(n, k)*c(m, k), {k, 0, d - 1}] == 0, 1, If[Sum[c(n, k)*c(m, k), {k, 0, d - 1}] == 1, -1, 0]], {n, 0, d - 1}, {m, 0, d - 1}].at n=49A158417
• Numerator of Hermite(n, 3/17).at n=2A159531
• Riordan array (1/(1-x-x^2), x/(1+2*x)).at n=39A237498
• G.f.: Re((i; x)_inf), where (a; q)_inf is the q-Pochhammer symbol, i = sqrt(-1).at n=47A278399
• Expansion of Product_{k>0} 1/(Sum_{m>=0} x^(k*m^3)).at n=56A320120
• a(n) = Sum_{k=1..n} (-1)^(k+1) * floor(n/(2*k-1))^k.at n=43A350167