41663

Appears in sequences

• Number of positive integers <= 2^n of form 4 x^2 + 9 y^2.at n=19A054173
• Composite and every divisor (except 1) contains the digit 6.at n=9A062674
• G.f.: A(x) = (1/x)*Series_Reversion( x/Sum_{k=0..n} 2^[k(k-1)/2]*x^k ).at n=6A136654
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 493", based on the 5-celled von Neumann neighborhood.at n=37A272545