215985domain: NAppears in sequences4-dimensional figurate numbers: a(n) = n*binomial(n+2, 3).at n=32A002417Bisection of A002417.at n=16A100430The hyper-Wiener index of the Kneser graph K(n,2) (n>=5).at n=30A228307Numbers m such that m^2 + p^2 = k^2, with p > 0, where p = A007954(m) = the product of digits of m.at n=22A334558