30384

Appears in sequences

• Numbers whose square is a zeroless pandigital number (i.e., use the digits 1 through 9 once).at n=29A071519
• (n^(p-1) - 1)/p^2 mod p, where p is the first prime that divides (n^(p-1) - 1)/p.at n=5A178814
• Triangular array counting derangements by number of descents.at n=30A219836
• Numbers k such that 3*R_k - 20 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=16A256772
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 950", based on the 5-celled von Neumann neighborhood.at n=35A273829
• a(n) = 6*n*(9*n-5).at n=24A277984
• Numbers whose square contains all of the digits 1 through 9.at n=29A294661
• Irregular triangle of denominators of the average value of the first letter over all derangements of {1, 2, ..., n} with k descents.at n=27A332010
• Site percolation series for square lattice: coefficients of the power series expansion in powers of q=1-p of the probability that a given open site belongs to the infinite cluster, where p is the probability that a site is open.at n=15A391389