89055

Appears in sequences

• a(n) = (n-1)!! - (n-2)!!.at n=11A007911
• Triangle read by rows: d(n,k) = number of decreasing labeled trees with n nodes and largest leaf <= k, for 1 <= k <= n.at n=33A079268
• Floor((prime(n)/n)^n).at n=10A121623
• Difference between the double factorial of the n-th nonnegative odd number and the double factorial of the n-th nonnegative even number.at n=6A122649
• Row sums of triangle A137629.at n=39A137630
• Let M(n) = maximal value of (n/k)^k over all k = 1, 2, ...; a(n) = floor(M(n)).at n=30A139076
• Let M(n) = maximal value of (n/k)^k over all k = 1, 2, ...; a(n) = round(M(n)).at n=30A139077
• Coefficient triangle of the numerators of the (n-th convergents to) the continued fraction 1/(w+2/(w+3/(w+4/... .at n=67A180049
• Expansion of g.f. sqrt( (1-x + sqrt(1-14*x+x^2)) / (2*(1-14*x+x^2)) ).at n=5A245926
• Number of length 5+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=17A248542
• Rectangular array A(n, k) = (-1)^k*hypergeom([-k, k + n/2 - 1/2], [1], 4) with row n >= 0 and k >= 0, read by ascending antidiagonals.at n=33A300946
• Number of integer partitions of n whose differences are an aperiodic word.at n=45A329137
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of sqrt((1+(k-4)*x+sqrt(1-2*(k+4)*x+((k-4)*x)^2)) / (2 * (1-2*(k+4)*x+((k-4)*x)^2))).at n=41A337389
• Indices that give distinct values of A350090 in the order in which they appear.at n=22A350193