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).

1, 11, 1, 1011, 111001, 110011, 10001, 10111011, 1110111001, 1110110011, 1110010001, 1100111011, 100111001, 101100110011, 11100100010001, 11001110111011, 1001110111001, 1011001110110011, 111001001110010001

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• base
• easy

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), ...

Examples

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

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.

Crossrefs

Cf. A005150, A045999, A048522.

Extensions

More terms from Patrick De Geest, Jun 15 1999