-618

Appears in sequences

• Inverse Euler transform of {1, primes}.at n=41A030011
• McKay-Thompson series of class 36h for the Monster group.at n=70A112177
• Expansion of k(q) = r(q) * r(q^2)^2 in powers of q where r() is the Rogers-Ramanujan continued fraction.at n=68A112274
• Expansion of 1 + k(q) = 1 + r(q) * r(q^2)^2 in powers of q where r() is the Rogers-Ramanujan continued fraction.at n=69A112803
• Riordan array (-sqrt(4*x^2+8*x+1)+2*x+2, (sqrt(4*x^2+8*x+1)-2*x-1)/2).at n=24A121575
• A multiswitched integer differential-type sequence designed to be mostly odd: two types of integer differential sequences are switched in a way that is made odd: 1) a(n)=2*a(n-1)-a(n-2); 2) a(n)=3*a(n-1)-3*a(n-2)+a(n-3); the one back versions are 3) a(n)=2*a(n-2)-a(n-3); 4) a(n)=3*a(n-2)-3*a(n-3)+a(n-4).at n=48A137403
• Riordan array (f(x), x*f(x)) where f(x) is the g.f. of A126930.at n=47A202847
• Convolution square of A112274.at n=37A285355
• a(n) = floor(-(3/2)*a(n-1)), a(1)=-2.at n=14A333588
• Expansion of Product_{k>=1} 1 / (1 + x^Fibonacci(k)).at n=41A357381
• a(1) = 1; a(n) = Sum_{k=2..n} (-1)^k * k^2 * a(floor(n/k)).at n=13A361981
• G.f. A(x) satisfies A(x) = A(x^3)/A(x^2) - x^2.at n=83A378256