54585

Appears in sequences

• Least of four consecutive numbers which are cubefree and not squarefree, i.e., numbers k such that {k, k+1, k+2, k+3} are in A067259.at n=26A071320
• Numbers k such that k, k+1, k+2 and k+3 are products of 4 primes.at n=25A124728
• Numbers k with prime signature(k) = prime signature(k+1) = prime signature(k+2) = prime signature(k+3).at n=2A175590
• Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=7A316125
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=47A316130
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=52A316130
• Numbers k such that the binary reversal of k (A030101) is equal to the sum of the proper divisors of k (A001065).at n=3A329663
• Positive numbers k such that -k, -(k + 1), -(k + 2), and -(k + 3) are 4 consecutive negative negabinary-Niven numbers (A331728).at n=21A331825
• Numbers k such that sigma(k) = psi(k) + tau(k)^3 + pi(k).at n=4A390948