18728
domain: N
Appears in sequences
- Fermionic string states.at n=17A005309
- Number of 1-sided triangular strip polyedges with n cells.at n=7A151540
- Number of ways to place 3 nonattacking nightriders on a 3 X n board.at n=17A172218
- Number of nX4 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it, modulo 4.at n=2A239815
- T(n,k)=Number of nXk 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it, modulo 4.at n=17A239819
- Number of 3Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it, modulo 4.at n=3A239821
- Decimal representation of the n-th iteration of the "Rule 131" elementary cellular automaton starting with a single ON (black) cell.at n=7A267450
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 57", based on the 5-celled von Neumann neighborhood.at n=30A270077
- Expansion of e.g.f. Product_{k>=1} 1/(1 - H(k)*x^k), where H(k) is the k-th harmonic number.at n=6A305201