29826162

Appears in sequences

• 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=28A113405
• First differences of (A113405 prefixed with a 0).at n=28A131666
• a(n) = 3 A113405(n)- A113405(n+1).at n=28A133511
• Inverse binomial transform of A131666 after removing A131666(0) = 0.at n=27A135258
• a(n) = (2*(-1)^n - 2^(n+1) + 3*n*2^n)/9.at n=22A140960
• Number of (n+3) X (1+3) 0..1 arrays with each row and column divisible by 9, read as a binary number with top and left being the most significant bits.at n=24A262333
• a(n+3) = 2^n - a(n), a(0)=a(2)=1, a(1)=0 for n >= 0.at n=28A328881
• a(n) = Sum_{k=0..n} (-2)^k * |(n - k | k)|, where (a | b) denotes the Kronecker symbol.at n=27A367545