121290

Appears in sequences

• Number of binary arrays indicating the locations of trailing edge maxima of a random length-n 0..5 array extended with zeros and convolved with 1,-2,1.at n=21A222150
• Expansion of Product_{k>=1} ((1 + x^k) * (1 + 2*x^k)).at n=29A266819
• Number of length-(n+1) 0..4 arrays with new values introduced in sequential order, and with new repeated values introduced in sequential order, both starting with zero.at n=9A268323