A211864 Powers of three read in base 2.

1, 3, 9, 11, 17, 19, 41, 43, 81, 131, 169, 219, 241, 419, 681, 651, 849, 1203, 2441, 1867, 4369, 3027, 5625, 12475, 15457, 26403, 26553, 48795, 54561, 99667, 80345, 158731, 221313, 332467, 460857, 375451, 569345, 987267, 1181145, 1594971, 1924001, 4458531

Offset

0,2

Links

Table of n, a(n) for n=0..41.

Example

a(3)=11 because 3^3=27_10 but in base 2 it is interpreted as 2*2^1+7*2^0=4+7=11. That is to say, digits larger than the base are carried.

Mathematica

f[n_] := FromDigits[ IntegerDigits[3^n], 2]; Array[f, 42, 0]

Crossrefs

Cf. A004656.

Sequence in context: A201544 A225771 A215816 * A157139 A050538 A062227

Adjacent sequences: A211861 A211862 A211863 * A211865 A211866 A211867

Keyword

nonn,base,easy

Author

Robert G. Wilson v, Feb 10 2013

Status

approved