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 A115300 Greatest digit of n * least digit of n. 5
 1, 4, 9, 16, 25, 36, 49, 64, 81, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 0, 6, 12, 18, 24, 30, 36, 42, 48, 54, 0, 7, 14, 21, 28, 35, 42, 49, 56, 63, 0, 8 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(101) = 0 and A111707(101) = 1, but all previous terms match. a(n) = A169669(n) for n <= 100. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A054054(n)*A054055(n). - Reinhard Zumkeller, Apr 29 2015 EXAMPLE a(3) = 3 * 3 = 9, a(232) = 3 * 2 = 6, a(1889009898) = 9 * 0 = 0. PROG (Haskell) a115300 n = a054054 n * a054055 n  -- Reinhard Zumkeller, Apr 29 2015 CROSSREFS Cf. A037904 (greatest-least), A115299 (greatest+least), A111707. Cf. A054054, A054055, A169669. Sequence in context: A334832 A169669 A111707 * A085942 A066308 A063462 Adjacent sequences:  A115297 A115298 A115299 * A115301 A115302 A115303 KEYWORD base,nonn AUTHOR Rick L. Shepherd, Jan 20 2006 STATUS approved

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Last modified August 6 09:02 EDT 2020. Contains 336228 sequences. (Running on oeis4.)