216384

Appears in sequences

• Triangle read by rows: T(n,k) is the number of paths of length n in the first quadrant, starting at the origin, ending at height k and consisting of 2 kind of upsteps U=(1,1) (U1 and U2), 3 kind of flatsteps F=(1,0) (F1, F2 and F3) and 1 kind of downsteps D=(1,-1).at n=39A134426
• (2n^7 + 4n^6 - n^5 - 4n^4 - n^3) / 24.at n=8A245940