18806

Appears in sequences

• Numbers k such that 2*3^k - 1 is prime.at n=26A003307
• 6th differences of factorial numbers.at n=2A023043
• Numerators of continued fraction convergents to sqrt(112).at n=10A041202
• Triangular array formed from successive differences of factorial numbers.at n=42A047920
• Numbers k such that k^2 contains only digits {3,5,6}.at n=4A053944
• a(n) = n*a(n-1) + (n-2)*a(n-2), a(0) = 0, a(1) = 2.at n=7A055790
• McKay-Thompson series of class 15A for Monster.at n=17A058508
• 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=33A061312
• 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=38A068106
• Difference triangle of factorial numbers read by upward diagonals.at n=29A116853
• First differences of the rows in the triangle of A116853, starting with 0.at n=38A116854
• McKay-Thompson series of class 15A for the Monster group with a(0) = 1.at n=17A134783
• Triangle of rank k of permutations of {1,2,...,n}.at n=51A134830
• McKay-Thompson series of class 15A for the Monster group with a(0) = 4.at n=17A153765
• G.f. satisfies: A(x) = (1 + x*A(x)^3) * (1 + x^2*A(x)^2).at n=7A200717
• Indices of the start of 10 successive distinct digits in the decimal expansion of Pi.at n=8A258157
• Triangle read by rows: T(n, k) = Sum_{t=k..n-2} (-1)^(t-k)*(n-t)!*binomial(t,k)*binomial(n-2,t).at n=21A264027
• Twice the area of the convex hull around dragon curve expansion level n.at n=13A341029
• Number of solid partitions of n with 4 parts.at n=40A387997