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 A004601 Expansion of Pi in base 2 (or, binary expansion of Pi). 63
 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 REFERENCES J. P. Delahaye, Le Fascinant Nombre Pi, "100000 digits of pi in base two", pp. 209-210; Pour la Science, Paris 1997. LINKS Vincenzo Librandi, Table of n, a(n) for n = 2..1000 Francisco Javier Aragón Artacho, 2 billion step walk on the digits of pi Elias's Pi Page, Binary representation of pi with 32768 digits J. Leroy, M. Rigo, and M. Stipulanti, Behavior of Digital Sequences Through Exotic Numeration Systems, Electronic Journal of Combinatorics 24(1) (2017), #P1.44. See w(n) in Example 19. Steve Pagliarulo, Stu's pi page: base 2 (23 pages) [link was dead, retrieved from the Internet archive] FORMULA a(n) = -2*floor(Pi*2^(-4 + n)) + floor(Pi*2^(-3 + n)) for n > 1. - Mariusz Iwaniuk, Apr 28 2017 EXAMPLE 11.0010010000111111011010101000100010000... MAPLE convert(evalf(Pi), binary, 120);  # Alois P. Heinz, Dec 16 2018 MATHEMATICA RealDigits[Pi, 2, 75][[1]] PROG (PARI) binary(Pi) \\ Altug Alkan, Apr 08 2018 CROSSREFS Cf. A000796, A119017, A068425, A117721, A065987, A051480, A007514. Pi in base b: this sequence (b=2), A004602 (b=3), A004603 (b=4), A004604 (b=5), A004605 (b=6), A004606 (b=7), A006941 (b=8), A004608 (b=9), A000796 (b=10), A068436 (b=11), A068437 (b=12), A068438 (b=13), A068439 (b=14), A068440 (b=15), A062964 (b=16), A060707 (b=60). Sequence in context: A133100 A216230 A077606 * A267418 A263919 A267520 Adjacent sequences:  A004598 A004599 A004600 * A004602 A004603 A004604 KEYWORD nonn,base,cons,easy AUTHOR STATUS approved

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Last modified October 22 13:19 EDT 2019. Contains 328318 sequences. (Running on oeis4.)