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 A104315 Numbers having in decimal representation at least one zero, but with no zero in their square. 8
 106, 107, 108, 109, 204, 206, 207, 208, 209, 304, 306, 307, 308, 309, 404, 406, 407, 408, 409, 604, 606, 607, 608, 704, 706, 707, 804, 806, 807, 808, 809, 904, 907, 908, 909, 1056, 1057, 1058, 1059, 1061, 1062, 1063, 1065, 1066, 1067, 1069, 1072, 1073 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A104316(n) = a(n)^2. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 FORMULA (1 - A168046(a(n))) * A168046(A000290(a(n))) = 1. - Reinhard Zumkeller, Jan 03 2014 EXAMPLE 909^2 = 826281, therefore 909 is a term. PROG (PARI) isok(n) = !vecmin(digits(n)) && vecmin(digits(n^2)); \\ Michel Marcus, Jan 03 2014 (Haskell) a104315 n = a104315_list !! (n-1) a104315_list = filter (\x -> a168046 x == 0 && a168046 (x ^ 2) == 1) [1..] -- Reinhard Zumkeller, Jan 03 2014 CROSSREFS Cf. A104317, A052041. Sequence in context: A286287 A050810 A234966 * A338602 A181739 A178314 Adjacent sequences: A104312 A104313 A104314 * A104316 A104317 A104318 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Mar 01 2005 STATUS approved

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Last modified February 28 07:05 EST 2024. Contains 370387 sequences. (Running on oeis4.)