54113

Appears in sequences

• a(n) = n + max_{0 <= i <n} ((n-i)*a(i)), a(0) = 1.at n=26A008609
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 27.at n=9A031615
• a(n) = a(n-1) + a(n-2) + 7 where a(0) = a(1) = 1.at n=19A111733
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 195", based on the 5-celled von Neumann neighborhood.at n=7A270690