43861

Appears in sequences

• Triangle T(n,k) of number of digraphs with a source on n unlabeled nodes with k arcs, k=0..n*(n-1).at n=65A057277
• Numbers n such that C(4n,n)/(3n+1) (A002293) is not divisible by 4.at n=41A078971
• Triangle of sums of Jacobsthal numbers related to binomial(4n,n)/(3n+1) mod 4.at n=32A113049
• A054525 * A000041.at n=41A133732
• Number of ways to arrange 3 indistinguishable points on an n X n X n triangular grid so that no three points are collinear at any angle.at n=11A194131
• Least n such that L(n)<-1 and L(n)>L(n-1), where L(k) means the least root of the polynomial p(k,x) defined at A206284, and a(1)=13.at n=22A206443
• Centered 12-gonal numbers which are semiprimes, intersection of A003154 and A001358.at n=39A218172
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 395", based on the 5-celled von Neumann neighborhood.at n=7A271686
• Number of n X 3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1s.at n=8A297577
• The 100 terms of the cycle that A321021 goes into.at n=58A321022