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 A249910 Digital root of A003500(n). 0
 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4, 2, 4, 5, 7, 5, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Periodic with cycle of length 6: {2,4,5,7,5,4}. a(n) may be expressed as the decimal expansion of 246/1001. Sequence is palindromic. LINKS Table of n, a(n) for n=0..101. Index entries for linear recurrences with constant coefficients, signature (1, 0, -1, 1). FORMULA a(n) = 4*a(n-1) - a(n-2), reduced to digital root. a(n) = digital root of (2 + sqrt(3))^n + ( 2 - sqrt(3))^n. MATHEMATICA LinearRecurrence[{1, 0, -1, 1}, {2, 4, 5, 7}, 102] (* Ray Chandler, Jul 25 2016*) CROSSREFS Cf. A010888, A003500. Sequence in context: A257433 A005532 A026202 * A025511 A224367 A308219 Adjacent sequences: A249907 A249908 A249909 * A249911 A249912 A249913 KEYWORD nonn,base AUTHOR Peter M. Chema, Dec 17 2014 EXTENSIONS More terms from Ray Chandler, Jul 25 2016 STATUS approved

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Last modified August 7 17:21 EDT 2024. Contains 375017 sequences. (Running on oeis4.)