-305

Appears in sequences

• Coefficients of modular function denoted G_6(tau) by Atkin.at n=5A005764
• First order recursion: a(0) = 1; a(n) = phi(n) - a(n-1) = A000010(n) - a(n-1).at n=56A083239
• Expansion of (1-x^2)/(1-x-x^2+x^3+x^4).at n=25A101496
• Diagonal sums of the Fibonacci related number triangle A110314.at n=34A110315
• Row sums of a number triangle related to the Pell numbers.at n=17A110331
• Diagonal sums of number a triangle related to the Pell numbers.at n=34A110332
• Triangle T, read by rows, that satisfies matrix equation: T + (T-I)^2 = C, where C is Pascal's triangle.at n=16A120903
• Negative of the Hankel transform of C(n) - C(n+2), where C = A000108.at n=5A138268
• Years in which a transit of Venus (as seen from Earth) took place or is expected to occur, according to the catalog by Fred Espenak.at n=25A171467
• Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=1, k=-1 and l=-1.at n=7A176953
• A (-1,1) Somos-4 sequence associated with the elliptic curve y^2 + y = x^3 + x.at n=8A178384
• First differences of A000463.at n=35A188652
• a(n) = p(n) - p(n-1) - p(n-2) + p(n-5), where p(n) = A000041(n).at n=26A195054
• The c coefficients of the transform a*x^2 + (4*a/k - b)*x + 4*a/k^2 + 2*b/k + c = 0 for a,b,c = 1,-1,-1, k = 1,2,3...at n=35A229526
• Alternating sum of hexagonal pyramidal numbers.at n=9A266677
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 435", based on the 5-celled von Neumann neighborhood.at n=13A272152
• Expansion of (1-q)^k/Product_{j=1..k} (1-q^j) for k=6.at n=51A275640
• a(n) = floor(c*r*a(n-1)) - floor(d*s*a(n-2)), where r = (1+sqrt(5))/2, s = r/(r-1), c = 1, d = 1, a(0) = 1, a(1) = 1.at n=14A275858
• The arithmetic function uhat(n,1,7).at n=60A291501
• The arithmetic function uhat(n,2,8).at n=60A291513