44906400domain: NAppears in sequencesMagic products of 6 X 6 multiplicative magic squares.at n=27A113026Number of arrangements on a line of n finite closed intervals (possibly of zero length) with k distinct endpoints (n >= 1, 1 <= k <= 2*n).at n=40A300729Diagonal terms in the expansion of 1/(1-x-2*y-3*z).at n=4A338076