151125domain: NAppears in sequencesa(n) = binomial(n+2,2) * binomial(n+7,2).at n=24A104676Number of length 7 nonnegative integer arrays starting and ending with 0 with adjacent elements differing by no more than n.at n=7A204215a(n) = Sum_{k=1..n} binomial(k+3,3) * floor(n/k).at n=39A366985