25036

Appears in sequences

• a(n) = Sum_{k=0..floor(n/2)} binomial(n,k)*4^(n-2*k).at n=7A100069
• Number of slanted nX7 (i=1..n)X(j=i..7+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, and 4 in the lower right corner.at n=1A165376
• Number of slanted 3 X n (i=1..3) X (j=i..n+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, and 4 in the lower right corner.at n=5A165386
• Number of minimal total dominating sets in the n-dipyramidal graph.at n=35A298823
• Number of compositions of n that are both a reversed Lyndon word and a co-Lyndon word.at n=20A334269