22172

Appears in sequences

• Numbers k such that 247*2^k+1 is prime.at n=24A032500
• Numbers whose base-3 representation has exactly 10 runs.at n=9A043590
• Numbers n such that number of runs in the base 3 representation of n is congruent to 1 mod 9.at n=27A043807
• Numbers n such that number of runs in the base 3 representation of n is congruent to 0 mod 10.at n=9A043815
• Triangle T(n,k) giving number of loopless matroids of rank k on n labeled points (n >= 0, 0 <= k <= n).at n=31A058710
• Triangle T(n,k) giving the number of loopless matroids of rank k on n labeled points (n >= 1, 1 <= k <= n).at n=23A058711
• Number of loopless matroids of rank 3 on n labeled points.at n=4A058715
• Number of 0..n arrays x(0..6) of 7 elements with zero 4th differences.at n=34A200274
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2<=x^2+y^2.at n=31A211634
• a(1)=1, a(2)=2, a(3)=3, a(4)=4, a(5)=5, a(n)=5*a(n-5)+4*a(n-4)+3*a(n-3)+2*a(n-2)+a(n-1).at n=12A286902
• Triangle read by rows. Number T(n, k) of partitions of the multiset [1, 1, 1, 1, 1, 2, 2, 2, 2, 2, ..., n, n, n, n, n] into k nonempty subsets, for 5 <= k <= 5n.at n=37A360039