

A279916


Least b such that A279688(n) and 2*A279688(n) are anagrams in base b.


1



5, 4, 8, 4, 3, 5, 5, 14, 4, 4, 4, 3, 3, 3, 4, 3, 4, 4, 4, 4, 20, 8, 23, 8, 11, 5, 5, 26, 5, 3, 3, 3, 4, 3, 4, 29, 3, 3, 3, 4, 3, 3, 4, 3, 4, 32, 6, 4, 11, 4, 4, 4, 35, 4, 4, 11, 4, 4, 4, 4, 4, 7, 38, 4, 6, 4, 4, 4, 4, 8, 41, 11, 16, 8, 44, 3, 47, 3, 3, 3, 3, 3
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OFFSET

2,1


LINKS

Peter Kagey, Table of n, a(n) for n = 2..10000


EXAMPLE

A279688(2) = 8, and a(2) = 5 because 5 is the least base such that 8 and 16 are anagrams: 8 = 13_5 and 16 = 31_5.


MATHEMATICA

DeleteCases[#, 0] &@ Table[Module[{b = 2}, While[2 b < n + 3 && Sort[IntegerDigits[n, b]] != Sort[IntegerDigits[2 n, b]], b++]; b Boole[2 b < n + 3]], {n, 780}] (* Michael De Vlieger, Dec 23 2016, after Robert G. Wilson v at A279688 *)


CROSSREFS

Cf. A023094, A279688, A279689.
Sequence in context: A203139 A184085 A086463 * A021952 A198579 A003672
Adjacent sequences: A279913 A279914 A279915 * A279917 A279918 A279919


KEYWORD

nonn,base,look


AUTHOR

Peter Kagey, Dec 23 2016


STATUS

approved



