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 A105517 Number of times 7 is the leading digit of the first n+1 Fibonacci numbers in decimal representation. 9
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,45 COMMENTS a(n) = #{k: A008963(k) = 7 and 0<=k<=n}; a(A105507(n)) = a(A105507(n) - 1) + 1; n = A105511(n) + A105512(n) + A105513(n) + A105514(n) + A105515(n) + A105516(n) + a(n) + A105518(n) + A105519(n). LINKS MATHEMATICA Accumulate[Table[If[IntegerDigits[Fibonacci[n]][[1]]==7, 1, 0], {n, 0, 120}]] (* Harvey P. Dale, Apr 29 2018 *) CROSSREFS Cf. A000030, A000045. Sequence in context: A319816 A343437 A348242 * A230774 A056813 A125269 Adjacent sequences: A105514 A105515 A105516 * A105518 A105519 A105520 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Apr 11 2005 STATUS approved

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Last modified December 7 13:02 EST 2022. Contains 358656 sequences. (Running on oeis4.)