23257

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 89.at n=24A020428
• a(n) = floor( Sum_{1 <= i < j <= n} ((sqrt(j)-sqrt(i))^3) ).at n=48A025197
• Number of partitions of n into parts not of the form 15k, 15k+2 or 15k-2. Also number of partitions with 1 part of size 1 and differences between parts at distance 6 are greater than 1.at n=45A035956
• a(n) = 16*n^2 + 4*n + 1.at n=38A082041
• Composites that are the sum of two, three, four and five consecutive composite numbers.at n=25A151745
• Number of ON states after n generations of cellular automaton based on f.c.c. lattice with each cell adjacent to its twelve neighbors.at n=29A151776
• Number of (n+1) X (4+1) 0..1 arrays with each row and column divisible by 3, read as a binary number with top and left being the most significant bits, and rows and columns lexicographically nondecreasing.at n=22A263869
• Values of w(k) when w(k-2), w(k-1), and w(k) are all odd, where w is A336957.at n=6A338071
• Numbers b > 1 such that the smallest four primes, i.e., 2, 3, 5 and 7 are base-b Wieferich primes.at n=25A339533
• Semiprimes k such that k+4, k+6, k+9, k+10 and k+14 are also semiprimes.at n=7A360666
• Numbers k such that k + 4, k + 6, k + 9, k + 10, and k + 14 are all semiprimes, where 4, 6, 9, 10, 14 are the first 5 semiprimes.at n=22A365240
• A family of marked Motzkin-like paths.at n=15A374585