23184

Appears in sequences

• Denominators of continued fraction convergents to sqrt(5).at n=8A001076
• a(n) = floor(Fibonacci(n)/2).at n=24A004695
• a(n) = Sum_{k=0..floor(n/4)} binomial(n-2k,2k).at n=23A005252
• a(n) is the concatenation of n and 8n.at n=22A009470
• [ n(n-1)(n-2)(n-3)/11 ].at n=24A011921
• a(n) = 8th Fibonacci polynomial evaluated at 2^n.at n=2A020534
• Expansion of Product_{m>=1} (1+m*q^m)^23.at n=4A022651
• a(n) = C(n-1,1) + C(n-3,3) + ... + C(n-2*m-1,2*m+1), where m = floor((n-2)/4).at n=21A024490
• Rectangular array of numbers Fibonacci(m(n+1))/Fibonacci(m), m >= 1, n >= 0, read by downward antidiagonals.at n=52A028412
• Expansion of (theta_3(z)*theta_3(15z) + theta_2(z)*theta_2(15z))^4.at n=29A028628
• Integers that appear as ratios of Fibonacci numbers F(kn)/F(k), but omitting Fibonacci numbers F(n)/F(1) and Lucas numbers F(2n)/F(n).at n=18A031122
• Triangle of Fibonomial coefficients (k=3).at n=37A034802
• Triangle of Fibonomial coefficients (k=3).at n=43A034802
• a(n) = F(n) / Product_{p|n} F(p), where F(k) is k-th Fibonacci number and the p's in product are the distinct primes dividing n.at n=23A051348
• a(n+2) = (2n+3)*a(n+1) + (n+1)^2*a(n), a(0) = 0, a(1) = 1.at n=6A054765
• Let N(k) and D(k) be the sequences defined in A054765 and A012244; write N(k)* D(k+j ) - N(k+j)*D(k) = (-1)^(k+1)*(k!)^2*P(k) where P(k) is a polynomial in k of degree j-1; sequence gives coefficients of expansion of P(k) in powers of k for j=1,2,3,...at n=20A054798
• Numbers that are the products of distinct substrings (>1) of themselves and do not end in 0.at n=27A059470
• Expansion of x*(1 + x - 2*x^2) / ( 1 - 4*x^2 - x^4).at n=16A059973
• a(0) = 0, a(1) = 4, then a(n) = 18*a(n-1) - a(n-2).at n=4A060645
• Numbers k such that the period of the continued fraction for sqrt(5)*k is 2.at n=38A065030