877820

Appears in sequences

• Number of generalized compositions of n: words b_1^{i_1}b_2^{i_2}...b_k^{i_k} such that b_j's and j_i's are positive integers and sum b_j*i_j = n.at n=16A129921
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 441", based on the 5-celled von Neumann neighborhood.at n=9A272222