1824768

Appears in sequences

• a(n)=(1/2)*T(2n,n), where T is given by A048113.at n=12A048117
• a(n)=T(2n+1,n+1), where T is given by A048113.at n=13A048118
• Numbers k such that rad(k)^2 divides sigma(k).at n=31A173615
• Number of (n+1) X 4 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two equal edges, and new values 0..2 introduced in row major order.at n=10A206210
• 10-step Fibonacci sequence starting with 0,0,1,0,0,0,0,0,0,0.at n=31A251765
• 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 361", based on the 5-celled von Neumann neighborhood.at n=20A281413
• Number of elements of order n in the simple unitary group U2(5).at n=14A284984
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 121", based on the 5-celled von Neumann neighborhood.at n=22A285913