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 A102766 Numbers n that can be chopped into two parts, which when added and squared result in n. 4
 1, 81, 100, 2025, 3025, 9801, 10000, 88209, 494209, 998001, 1000000, 4941729, 7441984, 23804641, 24502500, 25502500, 28005264, 52881984, 60481729, 99980001, 100000000, 300814336, 493817284, 1518037444, 6049417284, 6832014336 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Henry Ernest Dudeney, Amusements in Mathematics, 1917. See problem 113, "The torn number". FORMULA a(n) = A248353(n)^2. EXAMPLE a(7)=88209 as (88+209)^2 = 297^2 = 88209. CROSSREFS Supersequence of A238237. Sequence in context: A067521 A117686 A104113 * A256349 A202002 A249613 Adjacent sequences:  A102763 A102764 A102765 * A102767 A102768 A102769 KEYWORD nonn,base AUTHOR Bodo Zinser, Feb 10 2005 EXTENSIONS a(1)=1 prepended by Max Alekseyev, Aug 04 2017 STATUS approved

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Last modified January 17 18:48 EST 2019. Contains 319251 sequences. (Running on oeis4.)