133957148

Appears in sequences

• Denominators of continued fraction convergents to sqrt(5).at n=14A001076
• a(n) = floor(Fibonacci(n)/2).at n=42A004695
• Expansion of x*(1 + x - 2*x^2) / ( 1 - 4*x^2 - x^4).at n=28A059973
• a(0) = 0, a(1) = 4, then a(n) = 18*a(n-1) - a(n-2).at n=7A060645
• Nonprimes which are the average of two consecutive Fibonacci numbers.at n=12A071683
• Ratio-determined insertion sequence I(0.264) (see the link below).at n=13A085348
• Expansion of (1 + x)^2/((1 + x + x^2)*(1 + 3*x + x^2)).at n=20A113066
• Expansion of -x/((x^2+x+1)*(x^2+3*x+1)); invert transform gives signed version of tetrahedral numbers A000292.at n=20A113067
• Negative of the Hankel transform of C(n) - C(n+2), where C = A000108.at n=19A138268
• Largest proper divisor of the Fibonacci numbers > 1.at n=39A139045
• a(n) = (A000045(n)+A173432(n))/2.at n=41A173433
• p-INVERT of the positive integers, where p(S) = 1 - S^2.at n=20A290890
• Expansion of (1 - x + x^2)/((1 - x + x^2)^2 - 4*x^2).at n=20A376716
• Lower (1/2)-midsequence of (F(2n)) and (F(2n+1)), where F=A000045 (Fibonacci numbers); see Comments.at n=20A387778
• Upper (1/2)-midsequence of (F(2n)) and (F(2n+1)), where F=A000045 (Fibonacci numbers); see Comments.at n=20A387779