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A109217 Binary strings that have 0's where squares occur and 1's elsewhere. 1
0, 0, 1, 11, 1101, 11011, 110111, 1101111, 110111101, 1101111011, 11011110111, 110111101111, 1101111011111, 11011110111111, 1101111011111101, 11011110111111011, 110111101111110111, 1101111011111101111 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..17.

EXAMPLE

110111101 is a term because the string '00110111101' has zeros at the square indices 0,1,4,9 and the first two zeros are dropped.

CROSSREFS

Cf. A000037, A109218.

Sequence in context: A126197 A090814 A153435 * A109227 A133342 A110574

Adjacent sequences:  A109214 A109215 A109216 * A109218 A109219 A109220

KEYWORD

base,easy,nonn

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Jun 22 2005

STATUS

approved

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Last modified June 19 05:40 EDT 2013. Contains 226390 sequences.