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A257345 Regard the terms of A004290 as binary numbers and convert to base 10. 3
0, 1, 2, 7, 4, 2, 14, 9, 8, 511, 2, 3, 28, 9, 18, 14, 16, 29, 1022, 25, 4, 21, 6, 53, 56, 4, 18, 895, 36, 109, 14, 59, 32, 63, 58, 18, 2044, 7, 50, 21, 8, 31, 42, 109, 12, 1022, 106, 19, 112, 97, 4, 35, 36, 35, 1790, 6, 72, 25, 218, 223, 28, 37, 118, 991, 64 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Of course the terms of A004290 are already in base 10 (they just happen to involve only the digits 0 and 1), so there is no justification for this sequence other than curiosity.

a(n) < 2^n. - Chai Wah Wu, Apr 29 2015

LINKS

Chai Wah Wu, Table of n, a(n) for n = 0..9998

MATHEMATICA

s = With[{c = Rest[Union[FromDigits /@ Flatten[Table[Tuples[{1, 0}, i], {i, 10}], 1]]]}, Join[{0}, Flatten[Table[Select[c, Divisible[#, n] &, 1], {n, 120}]]]]; FromDigits[IntegerDigits@ #, 2] & /@ s (* Michael De Vlieger, Apr 29 2015, after Harvey P. Dale at A004290 *)

PROG

(Python)

def A257345(n):

....if n > 0:

........for i in range(1, 2**n):

............x = int(format(i, 'b'))

............if not x % n:

................return int(str(x), 2)

....return 0 # Chai Wah Wu, Apr 29 2015

CROSSREFS

Cf. A079339, A004290.

Sequence in context: A073239 A134882 A125140 * A110637 A092943 A196501

Adjacent sequences:  A257342 A257343 A257344 * A257346 A257347 A257348

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Apr 29 2015

EXTENSIONS

More terms from Chai Wah Wu, Apr 29 2015

STATUS

approved

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Last modified January 21 19:40 EST 2019. Contains 319350 sequences. (Running on oeis4.)