143165576

Appears in sequences

• Expansion of 1/((1-2*x)*(1-x^4)).at n=27A083593
• a(0)=0, a(n)=4a(n-1)+2 for n odd, a(n)=4a(n-1) for n even.at n=14A117616
• a(n)=a(n-1)+a(n-2)+a(n-3)+2a(n-4).at n=31A139800
• a(0)=0; a(n+1) = 2*a(n) + period 4:repeat 0,1,-2,1.at n=31A181586
• a(0)=0, a(1)=1, a(n) = least k>a(n-1) such that k+a(n-2) is a Jacobsthal number.at n=28A215095
• Numerator of c(n) = 2^(2*n)*(2^(2*n) - 1)/(2*n)!, a coefficient used in the expansion of tan(x) as Sum_{n>=1} c(n)*|Bernoulli(2*n)|*x^(2*n-1).at n=14A225845