27240

Appears in sequences

• 3rd differences of factorial numbers.at n=5A001565
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 22.at n=14A031700
• Triangular array formed from successive differences of factorial numbers.at n=39A047920
• Triangle T[n,m]: T[n,-1] = 0; T[0,0] = 0; T[n,0] = n*n!; T[n,m] = T[n,m-1] - T[n-1,m-1].at n=30A061312
• Sum of antidiagonals of A060736.at n=36A061349
• Euler's difference table: triangle read by rows, formed by starting with factorial numbers (A000142) and repeatedly taking differences. T(n,n) = n!, T(n,k) = T(n,k+1) - T(n-1,k).at n=41A068106
• a(n) is a non-palindromic composite located between twin primes whose reverse, which is less than it, is also located between twin primes.at n=21A103741
• Difference triangle of factorial numbers read by upward diagonals.at n=32A116853
• First differences of the rows in the triangle of A116853, starting with 0.at n=41A116854
• Triangle of rank k of permutations of {1,2,...,n}.at n=48A134830
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0110-1111 pattern in any orientation.at n=9A146382
• a(n) = 1728*n - 408.at n=15A157266
• a(n) = 225*n^2 + 15.at n=11A158557
• a(n) = 121*n^2 + n.at n=14A173267
• Number of acyclic orientations of the Turán graph T(n,5).at n=8A267385
• Sixth column of Euler's difference table in A068106.at n=7A280425
• Numbers k such that (14*10^k - 101)/3 is prime.at n=21A284886
• Number of partitions of n into colored blocks of equal parts with colors from a set of size n.at n=10A321880
• Number of edges among all distinct circles that can be constructed from a point on the origin and n equally spaced points on each of the +x,-x,+y,-y coordinates axes when each pair of points is connected by a circle and where the points lie at the ends of the circles' diameter.at n=4A362235
• Triangle read by rows: T(n, k) = (Sum_{i=0..n-k} (-1)^i * binomial(n-k, i) * (n+2-i)!) * binomial(n, k) / ((k+1) * (k+2)) for 0 <= k <= n.at n=24A373050