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 A308705 Decimal expansion of the constant formed by concatenating the terms of A076478 (binary vectors of lengths 1, 2, 3, ... in numerical order). 0
 2, 7, 6, 3, 8, 7, 1, 1, 7, 2, 7, 9, 4, 8, 6, 5, 2, 3, 7, 3, 4, 1, 9, 8, 6, 7, 6, 2, 1, 1, 9, 0, 1, 2, 3, 0, 5, 5, 5, 0, 8, 9, 9, 8, 8, 1, 6, 0, 6, 8, 5, 5, 0, 6, 1, 4, 3, 6, 7, 6, 8, 1, 9, 1, 1, 5 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS The binary vectors "0,1,00,01,10,11,000,001,..." are concatenated into a constant "0.0100011011000001...", then converted to decimal. LINKS EXAMPLE 0.276387117279486523734198676211901230555089988160685506143676819115... MATHEMATICA m = 100; d[n_] := Rest@IntegerDigits[n + 1, 2] + 1; v = Flatten[Array[d, 4 m]] - 1; RealDigits[FromDigits[v, 2]/2^Length[v], 10, m][[1]] (* Amiram Eldar, Jul 05 2019 after Clark Kimberling at A076478 *) PROG (Python) from bigfloat import * import string def GenerateBitstring(bitstring, suffix, recurse):     if recurse == 0:         bitstring = bitstring + suffix     else:         bitstring = GenerateBitstring(bitstring, suffix + "0", recurse-1)         bitstring = GenerateBitstring(bitstring, suffix + "1", recurse-1)     return bitstring VulcanBinary = "" MaxRecursion = 8 for i in range(1, MaxRecursion+1):     VulcanBinary = GenerateBitstring(VulcanBinary, "", i) print '.' + VulcanBinary with precision(2000):     VulcanDecimal = BigFloat(0)     b = BigFloat(1)     for c in VulcanBinary:         b = b/2.         if c == '1':             VulcanDecimal = VulcanDecimal+b print VulcanDecimal print string.join([x + ', ' for x in str(VulcanDecimal)[2:]]) CROSSREFS Cf. A076478. Sequence in context: A021366 A334366 A135155 * A244847 A175477 A333521 Adjacent sequences:  A308702 A308703 A308704 * A308706 A308707 A308708 KEYWORD nonn,base,cons AUTHOR David McFadzean, Jun 18 2019 STATUS approved

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Last modified May 28 12:27 EDT 2020. Contains 334681 sequences. (Running on oeis4.)