125248

Appears in sequences

• Vampire numbers (definition 2): numbers n with an even number of digits which have a factorization n = i*j where i and j have the same number of digits and the multiset of the digits of n coincides with the multiset of the digits of i and j.at n=21A014575
• Expansion of e.g.f.: exp(2*x)/(1-2*x).at n=6A082032
• Triangular sequence of coefficients of the expansion of a degenerate partition of Chebyshev U(x,n);A053117 and Hermite H(x,n);A060821 functions: 1) f(x,t)=1/(1-2*x*t+t^2); 2) g(x,t)=Exp[2*x*t-t^2]; to give: p(x,t)=Exp[2*x*t-t^2]/(1-2*x*t+t^2).at n=27A137862
• Vampire numbers permutations of whose digits are other vampire numbers.at n=8A167266
• T(n,k) = Sum_{j=0..k} (k-j)^n * binomial(n,j).at n=40A215080
• Number of ways to split an integer partition of n into consecutive subsequences with equal sums.at n=46A317715