-10296
domain: Z
Appears in sequences
- a(n) = 5^n*sin(2n*arctan(1/2)) or numerator of tan(2n*arctan(1/2)).at n=5A066770
- Expansion of 1/(1 - 4*x + 5*x^2).at n=11A099456
- Imaginary part of (4 + 3i)^n.at n=5A139031
- Composition of Catalan and Fibonacci numbers.at n=47A189675
- a(n) = - 12*a(n-1) - 54*a(n-2) - 112*a(n-3) - 105*a(n-4) -36*a(n-5) - 2*a(n-6), with a(0)=3, a(1)=-6, a(2)=18, a(3)=-60, a(4)=210, a(5)=-756.at n=7A215635
- Series reversion of the g.f. of A228862.at n=17A228863