63440

Appears in sequences

• Number of n-input 3-output switching networks under the action of S(n) on the inputs and S(3) and complementing group C(2,3) on the outputs.at n=2A000857
• Stirling2 transform of [2,3,3,3,3,3,3,3,...].at n=8A060996
• Numbers k such that sopf(k) + 1 = sopf(k+1), where sopf(k) = A008472(k).at n=36A064111
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 4 and 6.at n=25A136883
• Coefficients in the expansion of C^2/B^10, in Watson's notation of page 106.at n=7A160458
• Number of open knight's tour diagrams of a 3 X n chessboard that are symmetric under 180-degree rotation and have "type F": the endpoints occur in different columns and agree in color with the cells in the nearest corner.at n=17A169774
• Number of 5-step knight's tours on an (n+2) X (n+2) board summed over all starting positions.at n=6A186854
• Expansion of Product_{k>=1} ((1+x^k)/(1-x^k))^(Fibonacci(k)).at n=15A260916
• Numbers k such that s(k) = s(k+1), where s(k) is A059975.at n=26A327250
• Number of n-step walks from one of the vertices with degree 3 to itself on the four-vertex diamond graph.at n=13A344261
• a(n) = Sum_{k=1..n} phi(k) * (floor(n/k)^4 - floor((n-1)/k)^4).at n=23A344600