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 A340036 Decimal expansion of sum of reciprocals of A005150(n) (where A005150(n) is the n-th term of the Look and Say sequence, Method A - initial term is 1). 0
 1, 1, 3, 9, 3, 6, 6, 1, 7, 3, 5, 9, 2, 6, 3, 9, 5, 2, 1, 1, 9, 1, 3, 4, 8, 9, 3, 5, 3, 1, 9, 9, 5, 8, 0, 8, 1, 9, 1, 8, 3, 6, 4, 2, 5, 6, 8, 0, 8, 2, 6, 4, 7, 6, 2, 7, 4, 3, 1, 3, 8, 5, 2, 0, 3, 5, 4, 9, 7, 6, 4, 9, 0, 8, 5, 0, 6, 7, 1, 6, 1, 5, 8, 3, 3, 9, 4 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS The series a(n) := 1 + 1/11 + 1/21 + 1/1211 + 1/111221 + 1/312211 + ... converges to 1.139366173592639521191348935319958... LINKS Table of n, a(n) for n=1..87. John H. Conway and Brady Haran, Look-and-Say Numbers (2014), Numberphile video. Eric Weisstein's World of Mathematics, Look and Say Sequence. Wikipedia, Look-and-say sequence. FORMULA Equals Sum_{k>=1} 1/A005150(k). EXAMPLE 1.139366173592639521191348935319958... CROSSREFS Cf. A005150. Sequence in context: A299633 A074959 A010632 * A195292 A197572 A224233 Adjacent sequences: A340033 A340034 A340035 * A340037 A340038 A340039 KEYWORD cons,nonn AUTHOR Marco Ripà, Dec 26 2020 EXTENSIONS More terms from Amiram Eldar, Dec 27 2020 STATUS approved

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Last modified August 7 17:47 EDT 2024. Contains 375017 sequences. (Running on oeis4.)