OFFSET
1,1
COMMENTS
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
EXAMPLE
(d(i)) = (1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0,...) = A004601, in which (0,0) first occurs as (a(3),a(4)).
MATHEMATICA
z = 100; s = StringJoin[Map[ToString, First[RealDigits[N[Pi], 10000], 2]]]];
Take[Map[#[[1]]&, StringPosition[s, "00"]], z] (*A293828*)
Take[Map[#[[1]]&, StringPosition[s, "01"]], z] (*A293829*)
Take[Map[#[[1]]&, StringPosition[s, "10"]], z] (*A293830*)
Take[Map[#[[1]]&, StringPosition[s, "11"]], z] (*A293831*)
(* Peter J. C. Moses, Oct 15 2017 *)
SequencePosition[RealDigits[Pi, 2, 200][[1]], {0, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Nov 09 2017 *)
CROSSREFS
KEYWORD
nonn,easy,base
AUTHOR
Clark Kimberling, Oct 20 2017
STATUS
approved