218103808
domain: N
Appears in sequences
- a(n) = (n+2)*2^(n-1).at n=24A001792
- a(n) = n*4^(n-1).at n=13A002697
- a(n) = 13*2^n.at n=24A005029
- a(n) = Sum_{k=0..floor(n/2)} k*binomial(n,2*k) = floor(n*2^(n-3)).at n=26A049610
- Denominators in the Taylor series for arccosh(x) - log(2*x).at n=12A052469
- Row sums of triangle A134352.at n=24A134353
- A007318 * A143097.at n=24A143099
- Numbers k such that k = A074206(k), the number of ordered factorizations of k.at n=11A163272
- a(n) = (2*n + 1)*16^n.at n=6A165283
- Row sums of A146565.at n=28A259098
- Number of nonequivalent ways to place n nonattacking kings on a 2 X 2n chessboard under all symmetry operations of the rectangle.at n=24A322284
- a(n) = nim-product of 2^3 and 2^n.at n=27A335160