26093

Appears in sequences

• a(n) = F(n) + L(n) + n, where F(n) (A000045) and L(n) (A000204) are Fibonacci and Lucas numbers respectively.at n=20A013915
• An Alexander sequence for the knot 9_48.at n=6A099461
• Numbers k such that Sum_{i=1..k} i^6 divides Product_{i=1..k} i^6.at n=28A166606
• Composite numbers k such that if k = a U b (where U denotes concatenation) then a' + b' = k', where a', b' and k' are the arithmetic derivatives of a, b and k.at n=12A239724
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 459", based on the 5-celled von Neumann neighborhood.at n=34A272289
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 670", based on the 5-celled von Neumann neighborhood.at n=7A273393
• a(n) = [x^n] (1 - 4*x)^(-n/2)*x/(1 - x).at n=6A323219
• Expansion of 1/((1-x) * (1-4*x)^3).at n=5A367592