101205domain: NAppears in sequencesa(n) = n*(n+1)*(n+2)*(n^2+2*n+17)/120.at n=24A257199Number of positive meanders (walks starting at the origin and ending at any altitude > 0 that never touch or go below the x-axis in between) with n steps from {-4,-3,-2,-1,0,1,2,3,4}.at n=6A278393