30943

Appears in sequences

• Numbers whose set of base-13 digits is {1,3}.at n=31A032920
• Number of nonnegative integer 3 X 3 matrices with sum of elements equal to n, under row and column permutations.at n=17A052365
• Numerators of partial sums of Catalan numbers scaled by powers of -1/16.at n=4A120794
• Number of 4Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 0 1 vertically.at n=7A207764
• Numbers k such that 9*R_(k+2) - 10^k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=16A257041
• Least number x such that x^n has n digits equal to k. Case k = 8.at n=28A285455
• Number of nX5 0..1 arrays with every element unequal to 0, 1, 2 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=8A318340
• Number of rooted trees with n nodes such that no more than four subtrees of the same size extend from the same node.at n=14A318798
• Number of rooted trees with n nodes such that no more than four isomorphic subtrees extend from the same node.at n=14A318851
• Numbers of the form prime(w)*prime(x)*prime(y) with w >= x >= y such that 2w = 3x + 4y.at n=38A358102
• Products of three distinct strong primes.at n=30A363782