138547332

Appears in sequences

• Number of cases in which the first player is killed in a Russian roulette game where 5 players use a gun with n chambers and the number of bullets can be from 1 to n. Players do not rotate the cylinder after the game starts.at n=27A119610
• a(n) = floor((-1 + 4^n)/(-1 + 2*n)).at n=15A191636
• a(n+5) = a(n+4)+a(n+3)+a(n+2)+a(n+1)+2*a(n) with a(0)=0, a(1)=a(2)=a(3)=a(4)=1.at n=30A226310
• a(n) = floor(2^(n+1)/n).at n=30A281375
• Number of aperiodic binary toroidal necklaces of size n.at n=31A323865
• Expansion of 1/((1 - 2*x)*(1 + x + x^2 + x^3 + x^4)).at n=28A349842