3728270
domain: N
Appears in sequences
- Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 3,2,0.at n=10A037667
- Number of fixed points in all 231-avoiding involutions in S_n.at n=19A059570
- Expansion of x^3/(1 - 2*x + x^3 - 2*x^4) = x^3/( (1-2*x)*(1+x)*(1-x+x^2) ).at n=25A113405
- First differences of (A113405 prefixed with a 0).at n=25A131666
- a(n) = 3 A113405(n)- A113405(n+1).at n=25A133511
- a(n) = floor(2^n/9).at n=25A153234
- a(n+3) = 2^n - a(n), a(0)=a(2)=1, a(1)=0 for n >= 0.at n=25A328881