124880

Appears in sequences

• a(0)=0, a(1)=1, a(n)=(a(n-1) XOR n) + a(n-2).at n=24A182509
• Number of 9-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-queen's tours (antidiagonal moves become knight moves) on an n X n board summed over all starting positions.at n=3A187864
• a(n) = number of decimal digits of A007505(n).at n=48A275247
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 577", based on the 5-celled von Neumann neighborhood.at n=21A283086
• Expansion of (1/x) * Series_Reversion( x / (1-x) * (1-x-x^3)^2 ).at n=10A369489