2269806340

Appears in sequences

• Expansion of 2*x*(1 - x)/(1 - 3*x + x^2).at n=23A052995
• Row sums of array T in A055818; twice the odd-indexed Fibonacci numbers after initial term.at n=23A055819
• Number of base 4 n-digit numbers with adjacent digits differing by one or less.at n=22A126358
• First differences of A137976 after having added two leading ones.at n=18A138298
• Denominators of A178381(4*n+3)/A178381(4*n+2).at n=22A179133
• a(n) = (F(2*n-1) + F(2*n+2)) * (5/6 - cos(2*Pi*n/3)/3), where F(n) = Fibonacci(n).at n=22A179134
• a(n) = least m such that 1/2^(n+1) < f(m) < 1/2^n, where f(m) = fractional part of m*(golden ratio).at n=30A283747