OFFSET
1,1
REFERENCES
Michael D. Hirschhorn, The Power of q: A Personal Journey, Springer 2017. See Chapter 31.
MATHEMATICA
Total/@Subsets[(2*Range[10])^2, {4}]//Union (* Harvey P. Dale, May 21 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 19 2018
STATUS
approved