

A138150


nth run has length nth prime, with digits 0 and 1 only, starting with 0.


4



0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..77.


EXAMPLE

.n ..... Run ....................... Length
.1 ..... 0,0 ....................... 2
.2 ..... 1,1,1 ..................... 3
.3 ..... 0,0,0,0,0 ................. 5
.4 ..... 1,1,1,1,1,1,1 ............. 7
.5 ..... 0,0,0,0,0,0,0,0,0,0,0 ..... 11


MATHEMATICA

With[{nn=11}, Riffle[Table[PadRight[{}, Prime[n], 0], {n, 1, nn, 2}], Table[ PadRight[ {}, Prime[n+1], 1], {n, 1, nn, 2}]]//Flatten] (* Harvey P. Dale, Nov 28 2018 *)


CROSSREFS

Cf. A000040, A057212.
Sequence in context: A180433 A165560 A014306 * A271591 A287790 A285159
Adjacent sequences: A138147 A138148 A138149 * A138151 A138152 A138153


KEYWORD

easy,nonn


AUTHOR

Omar E. Pol, Mar 29 2008


STATUS

approved



