304186

Appears in sequences

• Trajectory of 1 under map n->21n+1 if n odd, n->n/2 if n even.at n=25A033967
• Trajectory of 3 under map n->21*n+1 if n odd, n->n/2 if n even.at n=32A037108
• Number of n X n binary matrices with at most two 1's in each row and column, other entries 0.at n=5A197458
• Number of binary n X n matrices in which each row or column sum is at most n/2.at n=5A247158
• Triangle read by rows: T(n,k) = number of n X n (0,1) matrices with at most k 1's in each row or column.at n=11A283500