3604480

Appears in sequences

• A convolution triangle of numbers obtained from A036070.at n=36A030526
• Expansion of (-1+1/(1-4*x)^4)/(16*x); related to A038846.at n=8A036070
• a(n) = (3*n-2)*2^(n-3).at n=17A066373
• Number of elementary arches of size n.at n=8A085614
• Third column of A059450.at n=17A086866
• Triangle read by rows: T(n,k) (n >= 2, k >= 1) is the number of non-crossing connected graphs on n nodes on a circle such that the distance from a fixed node (root) to the next node is k. Rows are indexed 2,3,4,...; columns are indexed 1,2,3, ... .at n=36A143018
• 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 870", based on the 5-celled von Neumann neighborhood.at n=21A290625
• Fixed points of map n -> A366275(n).at n=37A366277