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A045998 Binary Gleichniszahlen-Reihe (BGR) sequence: describe previous term (cf. A005150), reduce number of digits seen mod 2 (then for the purposes of this data-base, discard leading zeros). 2
1, 11, 1, 1011, 111001, 110011, 10001, 10111011, 1110111001, 1110110011, 1110010001, 1100111011, 100111001, 101100110011, 11100100010001, 11001110111011, 1001110111001, 1011001110110011, 111001001110010001 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Terms with a leading zero: a(2),a(6),a(12),a(16),a(20),a(28),a(32),a(36),a(40),a(44),a(48),a(60),...

REFERENCES

N. Worrick, S. Lewis and B. Shrader, A possible formula for the length of BGR sequences, Graph Theory Notes of New York, XXXVI (1999), p. 25.

LINKS

Table of n, a(n) for n=0..18.

EXAMPLE

1,11,01,1011,111001,110011,010001,... (after 110011, next term is 212021 -> 010001 -> 10001).

CROSSREFS

Cf. A005150, A045999, A048522.

Sequence in context: A132098 A223513 A160480 * A287194 A283083 A288401

Adjacent sequences:  A045995 A045996 A045997 * A045999 A046000 A046001

KEYWORD

nonn,base,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Patrick De Geest, Jun 15 1999.

STATUS

approved

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Last modified January 22 22:37 EST 2018. Contains 298093 sequences.