24402

Appears in sequences

• Number of polyhexes of class PF2.at n=5A026298
• Number of n X 2 1..6 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nonincreasing order.at n=5A166828
• 7 times hexagonal numbers: a(n) = 7*n*(2*n-1).at n=42A195320
• Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y<3z.at n=14A212508
• a(n) = floor(3^n/n^2).at n=13A230664
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 169", based on the 5-celled von Neumann neighborhood.at n=34A270463
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 190", based on the 5-celled von Neumann neighborhood.at n=39A270683
• Number of non-equivalent ways to place 2 non-attacking kings on an n X n board.at n=24A279111
• Number of even permutations p of {1,...,n} such that p(i) is not i or i+1.at n=9A293042
• Ordered perimeters p of primitive Pythagorean triangles no side of which is squarefree.at n=39A329392
• Integers which can be written in exactly three ways as sum of two distinct nonzero pentagonal numbers.at n=29A333013
• Total sum of parts which are squares in all partitions of n.at n=27A342228