19085

Appears in sequences

• Numbers k such that 10*13^k + 1 is prime.at n=19A057464
• Sum of the squares of the first n nonsquarefree numbers (A013929).at n=19A111732
• Number of arrays of -2..2 integers x(1..n) with every x(i) in a subsequence of length 1 or 2 with sum zero.at n=9A193642
• Number of Carlitz compositions of n with exactly eight descents.at n=4A241698
• Expansion of e.g.f. exp(4*(exp(x) - 1) - x).at n=6A367919