10930514688
domain: N
Appears in sequences
- Two decks each have n kinds of cards, 2 of each kind. The first deck is laid out in order. The second deck is shuffled and laid out next to the first. A match occurs if a card from the second deck is next to a card of the same kind from the first deck. a(n) is the number of ways of achieving no matches.at n=7A000316
- Number of permutations with no hits on 2 main diagonals.at n=14A003471
- Number of permutations p of [n] with no fixed points and cyclic displacement of elements restricted by six: p(i)<>i and (i-p(i) mod n <= 6 or p(i)-i mod n <= 6).at n=14A260111
- Multi-table menage numbers T(n,k) for n,k >= 1 equals the number of ways to seat the gentlemen from n*k married couples at n round tables with 2*k seats each such that (i) the gender of persons alternates around each table; and (ii) spouses do not sit next to each other; provided that the ladies are already properly seated (i.e., no two ladies sit next to each other).at n=29A277256
- Number of X-based filling of diagonals in a diagonal Latin square of order n with the main diagonal in ascending order.at n=14A337302
- Number of X-based filling of diagonals in a diagonal Latin square of order n with the main diagonal in ascending order.at n=15A337302
- Maximum value in the n-th row of A354408.at n=12A354409