98670

Appears in sequences

• Triangle read by rows: T(n,k) = binomial(3n+3, k)*(n-k+1)/(n+1).at n=42A064282
• Products of exactly 6 distinct primes.at n=18A067885
• Numbers k such that Sum_{d divides k} sigma(d)/phi(d) is an integer.at n=33A068991
• Numbers with six distinct prime divisors.at n=23A074969
• Inverse of Riordan array (1/(1-x)^3, x/(1-x)^3).at n=38A127894
• Inverse of Riordan array (1/(1+x)^3, x/(1+x)^3).at n=38A127898
• Expansion of (16+24*x+2*x^2)/(x-1)^6.at n=10A190049
• a(n) = 3*binomial(3*n+9, n)/(n+3).at n=6A230547
• Square table where T(n,k) = binomial(n*(n+k), k) * n/(n+k), for n>=1, k>=0, as read by antidiagonals.at n=41A299427
• Numbers k > 2 such that omega(k) > log(log(k)) + 2 * sqrt(log(log(k))), where omega(k) is the number of distinct primes dividing k (A001221).at n=26A336910
• Lexicographically earliest sequence of positive distinct terms such that the digital root of a(n) is the number of distinct prime factors of a(n+1).at n=51A337096