489888

Appears in sequences

• Expansion of 1/((1-6*x)*(1-12*x)).at n=5A016175
• Stirling2 triangle with scaled diagonals (powers of 6).at n=22A075501
• a(1) = 4, a(n+1) = smallest multiple of a(n) using only composite digits (4,6,8,9,0) and which is not divisible by 10.at n=6A078236
• a(1) = 6, a(n+1) = smallest multiple of a(n) using only digits (4,6,8,9,0) and not divisible by 10.at n=5A078237
• Triangle read by rows giving coefficients of polynomials arising in successive differences of central binomial numbers.at n=30A094796
• Triangular sequence based on the coefficients of the magnetic model for q=1/2: p(x,t)=Exp[x*t]*((t^2 + 1/2 - 1)/(2*t + 1/2 - 2))^2.at n=42A137481
• E.g.f. satisfies: A(x,y) = exp(x*y*exp(x*A(x,y))).at n=39A161552
• Integer areas of orthic triangles of integer-sided triangles.at n=26A230402
• Triangular array read by rows: T(n,k) is the number of forests of rooted labeled trees such that the vertex labeled with 1 is in a component (rooted tree) of size k, n>=1, 1<=k<=n.at n=33A232055
• Numbers n with the property that it is possible to write the base 2 expansion of n as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have sigma(a)*sigma(b) = n.at n=25A244079
• Numbers m such that Product(1 + p_i) = Product(1 + e_i), where m = Product((p_i)^e_i).at n=40A272858
• p-INVERT of the odd positive integers, where p(S) = (1 - S)^2.at n=10A292482
• Triangle read by rows of coefficients in expansion of (3-2x)^n, where n is a nonnegative integer.at n=49A303901
• Triangle read by rows of coefficients in expansions of (-2 + 3*x)^n, where n is nonnegative integer.at n=50A317498
• Sequence starting with a(1) = 2 and always extended with the product "n-th digit * n-th term". When the product is = 0, we don't extend the sequence with 0 but with the smallest integer not yet present.at n=30A337109