30645

Appears in sequences

• Numbers whose base-5 representation contains exactly three 0's and three 4's.at n=27A045217
• a(n) = ceiling(binomial(n,8)/n).at n=23A053731
• Triangle T(n, k) = Sum_{m=0..k} Sum_{j=0..m} Multinomial(n-k-m-j, j, m, k), read by rows.at n=57A141724
• Number of reduced words of length n in the Weyl group E_8 on 8 generators and order 696729600.at n=12A162494
• Number of 0..6 arrays x(0..n) of n+1 elements with zero n-1st differences.at n=11A200080
• Numbers such that the decimal digits of sigma(n) are a permutation of those of sigma(n)-n.at n=14A277114
• Expansion of e.g.f. Product_{k>0} 1/(1 - (2 * x)^k)^(1/2^k).at n=6A356538
• a(n) = Sum_{k=0..n} 3^(n-k) * binomial(n,k) * binomial(2*n,k).at n=5A387929