19667

Appears in sequences

• Number of down/up (initially descending) compositions of n.at n=24A025049
• a(n) = p(1)p(n) + p(2)p(n-1) + ... + p(k)p(n-k+1), where k = [ n/2 ], p = A000040, the primes.at n=28A025129
• Number of primes of the form 12k + 7 less than 10^n.at n=5A091163
• Pierce expansion of log(2).at n=15A091846
• Numbers n such that p(6n) is prime, where p(n) is the number of partitions of n.at n=38A111036
• Monotonic ordering of nonnegative differences 3^i-4^j, for 40>= i>=0, j>=0.at n=38A192147
• Number of distinct values of the sum of 3 products of three 0..n integers.at n=19A225260
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 179", based on the 5-celled von Neumann neighborhood.at n=30A270624
• a(n) = floor(c*s*a(n-1)) + floor(d*r*a(n-2)), where r = 1 + sqrt(2), s = r/(r-1), c = 2, d = 1, a(0) = 1, a(1) = 1.at n=8A275859