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N. J. A. Sloane, editor, The On-Line Encyclopedia of Integer Sequences, published electronically at https://oeis.org, [date]\\  Eric Weisstein's World of Mathematics, Rough Number\\  Finch, S. "RE: Unusual Numbers." 27 Aug 2001. http://listserv.nodak.edu/scripts/wa.exe?A2=ind0108&L=NMBRTHRY&F=&S=&P=963.\\  Finch, S. R. "Stieltjes Constants." §2.21 in Mathematical Constants. Cambridge, England: Cambridge University Press, pp. 166-171, 2003. 2003.\\  https://reference.wolfram.com/language/ref/InverseZTransform.html\\  http://reference.wolfram.com/language/ref/GeneratingFunction.html\\