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 A117431 String n is at position n in decimal digits of golden ratio (phi). 1
 1, 20, 62, 9956 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The next such number is greater than 10^7. Not only does number 20 occur at the 20th digit, but it occurs again as the 20th pair of digits (cf. A117432). LINKS Eric Weisstein's World of Mathematics, The Golden Ratio EXAMPLE 1 is a term because the first digit in the golden ratio phi is 1. (phi = 1.6180339887498948482045 ...) MATHEMATICA StringFinder[m_] := Module[{cc = 10^m + m, sol, aa}, sol = Partition[RealDigits[(1+Sqrt[5])/2, 10, cc] // First, m, 1]; Do[aa = FromDigits[sol[[i]]]; If[aa==i, Print[{i, aa}]], {i, Length[sol]}]; ] Example: StringFinder[2] produces all 2-digit members of the sequence. CROSSREFS Cf. A001622, A057679, A117432. Sequence in context: A105092 A112144 A007248 * A159504 A117432 A033577 Adjacent sequences:  A117428 A117429 A117430 * A117432 A117433 A117434 KEYWORD base,more,nonn AUTHOR Colin Rose, Mar 14 2006 STATUS approved

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Last modified December 15 18:56 EST 2018. Contains 318150 sequences. (Running on oeis4.)