66436

Appears in sequences

• Numbers whose base-3 representation has exactly 11 runs.at n=3A043591
• Numbers n such that number of runs in the base 3 representation of n is congruent to 1 mod 10.at n=23A043816
• Coefficients in the series (1 + x^2 + x^3 + x^5 + x^7 + x^11 + x^13 + ... )/(1 - x - x^4 - x^6 - x^8 - x^9 - x^10 - x^12 - x^14 - ... ).at n=27A058355
• E.g.f. C(x,y) = 1 + Integral S(x,y)*C(y,x) dx such that C(x,y)^2 - S(x,y)^2 = 1 and C(y,x) = Integral S(y,x)*C(x,y) dy, where C(x,y) = Sum_{n>=0} Sum_{k=0..n} T(n,k) * x^(2*n-2*k)*y^(2*k)/((2*n-2*k)!*(2*k)!), as a triangle of coefficients T(n,k) read by rows.at n=29A322221
• E.g.f. C(y,x) = 1 + Integral S(y,x)*C(x,y) dy such that C(y,x)^2 - S(y,x)^2 = 1 and C(x,y) = Integral S(x,y)*C(y,x) dx, where C(y,x) = Sum_{n>=0} Sum_{k=0..n} T(n,k) * x^(2*n-2*k)*y^(2*k)/((2*n-2*k)!*(2*k)!), as a triangle of coefficients T(n,k) read by rows.at n=34A322222
• E.g.f. G(x,y) = Integral C(x,y)*S(y,x) dx such that C(x,y)^2 + S(x,y)^2 = 1 and S(y,x) = Integral C(x,y)*C(y,x) dy, as a triangle of coefficients T(n,k) read by rows.at n=26A367382