57044

Appears in sequences

• Numbers n such that 155*2^n-1 is prime.at n=21A050619
• Number of 1..9 integer arrays v[1..n] of length n with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..n-1.at n=4A171283
• Number of 1..n integer arrays v[1..5] of length 5 with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..4.at n=8A171342
• Expansion of (2/(3*sqrt(1-4*z)-1+4*z))*((1-sqrt(1-4*z))/(2*z))^k with k=6.at n=7A172063
• Convolution of A000107 and A027852.at n=12A269800
• G.f. A(x) satisfies: A(x) = A(x^2 + x^3) / x.at n=27A350432
• a(n) = Sum_{k=0..n} (-1)^k * binomial(3*n-k-1,n-k).at n=7A371813