19372

Appears in sequences

• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite HEU = Heulandite Ca4[Al8Si28O72].24H2O starting with a T3 atom.at n=13A019136
• 1 - (5/6)*n + (5/2)*n^2 + (10/3)*n^3 + n^4.at n=11A057675
• Number of 6-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.at n=14A187511
• Number of (n+2)X(n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=15A252711
• Number of (n+1)X(5+1) arrays of permutations of 0..n*6+5 with each element having directed index change 0,1 0,-1 -2,0 or 1,1.at n=5A264875
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change 0,1 0,-1 -2,0 or 1,1.at n=50A264878
• Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,1 0,-1 -2,0 or 1,1.at n=4A264883
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 654", based on the 5-celled von Neumann neighborhood.at n=39A273332
• a(n) = Sum_{d|n} sigma_3(d).at n=23A321140
• Successive records of function f(x) = log(abs(pi(x) - R(x)))/log(x) where pi(x) is the number of primes <= x and R(x) is Riemann's prime counting function.at n=55A353055
• Number of free polyjogs with n cells.at n=7A354308
• a(n) is the smallest number k such that A275235(k) = n.at n=17A354840
• a(n) = smallest k such that li(k) - pi(k) >= n, where li(k) is the logarithmic integral and pi(x) is the number of primes <= x.at n=33A359145
• The five digits of a(n) and their four successive absolute first differences are all distinct.at n=6A365257
• Number of permutations p of the multiset {0,0,1,1,2,2,...,n,n} such that p(1) = 0, p(2n+2) = n, and |p(i) - p(i-1)| is always 1 or 2.at n=7A375092