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A006938 Convert the last term from decimal to binary!
(Formerly M4814)
10
3, 11, 1011, 1111110011, 1000010001110100011000101111011 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The next term (a(5)) has 100 digits. - Harvey P. Dale, Feb 28 2012

The number of digits of a(n) are 2, 4, 10, 31, 100, 330, 1093, 3628, 12049, 40023, 132951, 441651, 1467130, 4873698, 16190071, 53782249, 178660761, ... - Robert G. Wilson v, Jul 10 2013

Log(a(n))/Log(a(n-1)) =~1/Log_10(2) = A020862. - Robert G. Wilson v, Jul 10 2013

REFERENCES

C. Pickover, Mazes for the Mind, St. Martin's Press, NY, 1992, p. 350.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..5.

MATHEMATICA

NestList[FromDigits[IntegerDigits[#, 2]]&, 11, 4] (* Harvey P. Dale, Feb 28 2012 *)

CROSSREFS

For initial terms 2 through 12 see A008559, A006938, A260025, A260024, A260026, A260027, A260028, A260029, A008559 (again), A006938 (again), A260030 respectively.

Sequence in context: A111130 A264725 A088579 * A124984 A287432 A034797

Adjacent sequences:  A006935 A006936 A006937 * A006939 A006940 A006941

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane

EXTENSIONS

Added a(1)=3. - N. J. A. Sloane, Jul 14 2015

STATUS

approved

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Last modified November 18 13:22 EST 2018. Contains 317306 sequences. (Running on oeis4.)