1610612737

Appears in sequences

• a(0) = 1; thereafter a(n) = 3*2^(n-1) + 1.at n=30A004119
• a(n) = T(7,n), array T given by A048472.at n=24A048479
• Expansion of g.f.: (3+x+2*x^2-2*x^3)/((1-2*x)*(1+x^2)).at n=29A100720
• a(1) = 2, a(2) = 4; a(n) = 2*a(n-1) - 1.at n=30A103204
• a(n) = 3*2^n + 1.at n=29A181565
• a(n) = 6*4^n + 1.at n=14A199116
• a(n) = a(n-1) + 2*a(n-2) with n>1, a(0)=2, a(1)=7.at n=29A201630
• a(0) = 1, a(n+1) = 2*a(n) + periodic sequence of length 2: repeat [5, -4].at n=29A280173
• a(0) = 3, a(n+1) = 2*a(n) + periodic sequence of length 2: repeat [1, -2].at n=29A280345
• Least number k such that the absolute value of the difference between the number of prime factors, with multiplicity, of k and k-1 is equal to n.at n=28A285787