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 A199693 Related to the expansion of Pi in base 2 (A004601). 0
 12, 4, 16, 126, 6, 2, 2, 8, 8, 16, 2, 6, 8, 48, 8, 6, 4, 24, 4, 24, 12, 24, 2, 8, 2, 896, 6, 224, 28, 6, 8, 4, 2, 4, 64, 4, 4, 224, 8, 8, 2, 4, 12, 124, 24, 14, 256, 32, 2, 14, 62, 2, 4, 24, 14, 24, 4, 28, 6, 12, 8, 4, 2, 8, 2, 4, 2, 32, 16, 60, 24, 56, 6 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A004601 is the concatenation of binary digits of a(n) written in base 2. LINKS EXAMPLE A004601( expansion of pi in base 2) : 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.... -> 1,1,0,0 | 1,0,0 | 1,0,0,0,0 | 1,1,1,1,1,1,0 | 1,1,0 | 1,0 | ... -> 1100 | 100 |10000 | 1111110 |110 |10 | 10 | ... (in base 2) -> 12 , 4, 16, 126, 6, 2, 2, ... (in base 10) . MATHEMATICA f[{a_, b_}] := (2^a - 1)*2^b; f /@ Partition[Length /@ Split[First[RealDigits[π, 2, 10^3]]], 2] (* T. D. Noe, Nov 09 2011 *) CROSSREFS Cf. A004601, A007088. Sequence in context: A307164 A181829 A339467 * A166206 A040137 A092237 Adjacent sequences:  A199690 A199691 A199692 * A199694 A199695 A199696 KEYWORD easy,nonn,base AUTHOR Philippe Deléham, Nov 09 2011 STATUS approved

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Last modified December 1 20:25 EST 2021. Contains 349435 sequences. (Running on oeis4.)