30710

Appears in sequences

• a(n) = (2*n+1)*(9*n+1).at n=41A033573
• a(n) is twice the smallest k such that A051686(k) = prime(n).at n=39A051692
• a(n) = 3*a(n-1) - 2*a(n-2) with a(0)=20 and a(1)=50.at n=10A182462
• Number T(n,k) of collections of nonempty multisets with a total of n objects of exactly k colors; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=41A255903
• Number of collections of nonempty multisets with a total of n objects of exactly five colors.at n=3A255945
• Number of collections of nonempty multisets with a total of n+3 objects of exactly n colors.at n=5A255953
• Products of four distinct primes between sphenic numbers (products of 3 distinct primes).at n=28A351382
• 11-gonal numbers which are products of four distinct primes.at n=5A354086