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A161603
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Odd terms of sequence A161602.
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2
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13, 25, 29, 41, 49, 53, 57, 59, 61, 81, 89, 97, 101, 105, 109, 113, 115, 117, 121, 123, 125, 145, 161, 169, 177, 181, 185, 193, 197, 201, 205, 209, 211, 213, 217, 221, 225, 227, 229, 233, 235, 237, 241, 243, 245, 247, 249, 251, 253, 289, 305
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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EXAMPLE
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29 in binary is 11101. Its digital reversal is 10111, which is 23 in decimal. Since 29 > 23, and since 29 is odd, 29 is in this sequence.
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MATHEMATICA
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Select[Range[1, 311, 2], #>FromDigits[Reverse[IntegerDigits[#, 2]], 2]&] (* Harvey P. Dale, Feb 20 2013 *)
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PROG
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(Python)
from itertools import count, islice
def A161603_gen(startvalue=1): # generator of terms >= startvalue
return filter(lambda n:n>int(bin(n)[-1:1:-1], 2), count(max(startvalue|1, 1), 2))
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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