26223

Appears in sequences

• Numbers k such that 6*R_k - 5 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=25A098088
• Partial sums of A006899.at n=21A170803
• G.f. satisfies: A(x) = Product_{n>=0} 1/( (1 - (x*A(x))^(5*n+1)) * (1 - (x*A(x))^(5*n+4)) ).at n=10A203067
• Odd numbers which are factored to the same set of primes in Z as to the irreducible polynomials in GF(2)[X]; odd terms of A235036.at n=28A235039
• First occurrence of 2*n in A035096.at n=49A247234
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 486", based on the 5-celled von Neumann neighborhood.at n=40A272508
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 659", based on the 5-celled von Neumann neighborhood.at n=26A273386
• Number of length n inversion sequences avoiding the patterns 102 and 201.at n=9A279566