28630

Appears in sequences

• Number of Q-graphs with 2n edges.at n=7A007171
• (n-th Fibonacci number that is not 1) - (n-th number that is 1 or not a Fibonacci number).at n=20A014242
• Number of permutations with at most 2 queens on any torus diagonal, solutions congruent on the torus count only once.at n=11A062167
• Number of elements e in all partitions of n such that e divides n.at n=30A089251
• a(n) = 7*2^n - 3*n - 6.at n=12A097810
• Values of x in solutions (x,y,z) to the Diophantine equation x^3-x^2+y^3-y^2=z^3-z^2, with 1<x<y<z.at n=37A138667
• Table which contains in row n the mapping of the n-th block of 4 primes to 4 integers.at n=30A162156
• a(n) is the position of the last two-tuple within the reverse lexicographic set of partitions of 2n and 2n+1, with a(1)-a(n) representing the positions of every 2-tuple partition of 2n and 2n+1.at n=30A216053
• Number of binary arrays indicating the locations of trailing edge maxima of a random length-n 0..5 array extended with zeros and convolved with 1,1,1.at n=21A222435
• Numbers k such that 9*R_k + 10^k - 8 is prime, where R_k = 11...11 is the repunit (A002275) of length k.at n=10A259120
• Preperiod (or threshold) of orbit of Post's {00, 1101} tag system applied to the word (100)^n, or -1 if this word has an unbounded trajectory.at n=48A284119
• Number of unlabeled set-systems with {} that are closed under intersection and cover n vertices.at n=5A326883
• Number of unlabeled multigraphs with loops allowed and n edges covering three vertices.at n=25A327728
• Number of compositions of n with strictly increasing run-lengths.at n=48A333192