48213

Appears in sequences

• a(n) = Sum_{k=0..n} (-1)^(n-k)*A000041(k).at n=45A087787
• For a given unrestricted partition pi, let P(pi)=lambda(pi), if mu(pi)=0. If mu(pi)>0 then let P(pi)=nu(pi), where nu(pi) is the number of parts of pi greater than mu(pi), mu(pi) is the number of ones in pi and lambda(pi) is the largest part of pi.at n=44A100818
• Number of 2's in the last section of the set of partitions of n.at n=47A182712
• Number of 2's in all partitions of 2n+1 that do not contain 1 as a part.at n=23A182717
• Floor(sqrt(2*3^n)).at n=19A221944
• Index of the smallest triangular number greater than 3^n.at n=19A266498
• Number of non-equivalent ways (mod D_2) to select 4 points from n equidistant points on a straight line so that no selected point is equally distant from two other selected points.at n=38A300761
• Number of unlabeled bicolored acyclic graphs with n nodes of each color.at n=8A329055