254625

Appears in sequences

• Smallest multiple of the n-th prime beginning and ending in n with a(1)=a(3)=0.at n=24A078212
• Triangle read by rows: T(n,k) is number of paths from (0,0) to (3n,0) that stay in the first quadrant (but may touch the horizontal axis), consisting of steps u=(2,1), U=(1,2), or d=(1,-1) and have k peaks of the form ud.at n=40A108446