98784

Appears in sequences

• Galois numbers for p=7; order of group AGL(n,7).at n=2A028669
• Triangle of labeled mobiles (circular rooted trees) with n nodes and k leaves.at n=33A055349
• Number of labeled mobiles (circular rooted trees) with n nodes and 6 leaves.at n=1A055353
• a(n) = (n+2)! * Sum_{k=1..n} 1/k.at n=6A180218
• Floor[1/{(3+n^4)^(1/4)}], where {}=fractional part.at n=41A184538
• Exponential Riordan array (log(1/(1-x)), x*A005043(x)).at n=39A185815
• Numbers with prime factorization p^2*q^3*r^5 where p, q, and r are distinct primes.at n=5A190470
• Triangle read by rows, n>=1, 1<=k<=n, T(n,k) = k*binomial(n,k)^3*(n^2+n-k*n-k+k^2)/((n-k+1)^2*n).at n=30A202409
• Triangle read by rows, n>=1, 1<=k<=n, T(n,k) = k*binomial(n,k)^3*(n^2+n-k*n-k+k^2)/((n-k+1)^2*n).at n=33A202409
• Number of (w,x,y,z) with all terms in {1,...,n} and w>=average{x,y,z}.at n=21A212089
• Numbers with an even number of prime factors (counted with multiplicity) that can be factored into squarefree semiprimes (A320911) but cannot be factored into distinct semiprimes (A320892).at n=30A320893
• Coreful 3-abundant numbers: numbers k such that csigma(k) > 3*k, where csigma(k) is the sum of the coreful divisors of k (A057723).at n=35A340109
• Numbers of multiplicative persistence 5 which are themselves the product of digits of a number.at n=3A350184
• Primitive coreful 3-abundant numbers: coreful 3-abundant numbers (A340109) that are powerful numbers (A001694).at n=27A364991
• Numbers k for which sigma(k) >= 2*k and (sigma(k) - 2*k) AND k = k, where AND is bitwise-and, A004198.at n=47A388026