180736

Appears in sequences

• Figurate numbers based on the 24-cell (4-D polytope with Schlaefli symbol {3,4,3}).at n=16A092181
• Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the consecutive pattern 45321; triangle T(n,k), n >= 0, 0 <= k <= max(0, floor((n-1)/4)), read by rows.at n=17A264781
• Number of permutations of [n] with exactly one occurrence of the consecutive pattern 45321.at n=5A264896
• Number of nX2 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=13A298448
• a(n) = (1/2) * Sum_{k=0..floor(n/3)} 2^(n-2*k) * binomial(2*n-4*k+2,2*k+1).at n=10A387602