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 A175543 Nonnegative integers that, when written in binary, are palindromes with a middle run of 0's. 1
 0, 5, 9, 17, 27, 33, 51, 65, 85, 99, 119, 129, 165, 195, 231, 257, 297, 325, 365, 387, 427, 455, 495, 513, 585, 645, 717, 771, 843, 903, 975, 1025, 1105, 1161, 1241, 1285, 1365, 1421, 1501, 1539, 1619, 1675, 1755, 1799, 1879, 1935, 2015, 2049, 2193, 2313, 2457 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..51. MATHEMATICA fQ[n_] := Block[{id = IntegerDigits[n, 2]}, id == Reverse@ id && id[[ Ceiling[ Length@ id/2] ]] == 0]; Select[ Range[0, 2564], fQ@# &] (* Robert G. Wilson v, Jun 27 2010 *) CROSSREFS Cf. A006995, A175544. Sequence in context: A089109 A100449 A146284 * A200078 A190806 A294774 Adjacent sequences: A175540 A175541 A175542 * A175544 A175545 A175546 KEYWORD base,nonn AUTHOR Leroy Quet, Jun 23 2010 EXTENSIONS a(9)-a(51) from Robert G. Wilson v, Jun 27 2010 STATUS approved

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Last modified December 4 08:19 EST 2023. Contains 367557 sequences. (Running on oeis4.)