%I #19 May 31 2021 10:09:36
%S 14,30,40,48,57,67,97,100,121,140,157,167,210,225,233,236,243,289,300,
%T 302,307,321,344,352,406,408,413,430,440,453,459,464,469,476,479,487,
%U 507,539,541,545,549,557,560,561
%N Positions of 7's in the decimal expansion of Pi.
%H Vincenzo Librandi, <a href="/A053751/b053751.txt">Table of n, a(n) for n = 1..1000</a>
%H <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a>
%F a(n) = A036974(n) + 1. - _Georg Fischer_, May 31 2021
%t Flatten[Position[RealDigits[Pi, 10, 1000][[1]], 7]] (* _Vincenzo Librandi_, Oct 07 2013 *)
%Y Cf. A036974.
%K nonn,base
%O 1,1
%A _Simon Plouffe_, Feb 20 2000
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