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A287092 Strobogrammatic nonpalindromic numbers. 0
69, 96, 609, 619, 689, 906, 916, 986, 1691, 1961, 6009, 6119, 6699, 6889, 6969, 8698, 8968, 9006, 9116, 9696, 9886, 9966, 16091, 16191, 16891, 19061, 19161, 19861, 60009, 60109, 60809, 61019, 61119, 61819, 66099, 66199, 66899, 68089, 68189, 68889, 69069, 69169, 69869, 86098, 86198, 86898, 89068, 89168 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Nonpalindromic numbers which are invariant under a 180 degree rotation.

Numbers that are the same upside down and containing digits 6, 9.

Intersection of A000787 and A029742.

Union of this sequence and A006072 gives A000787.

LINKS

Table of n, a(n) for n=1..48.

MATHEMATICA

fQ[n_] := Block[{s = {0, 1, 6, 8, 9}, id = IntegerDigits[n]}, If[ Union[ Join[s, id]] == s && (id /. {6 -> 9, 9 -> 6}) == Reverse[id], True, False]]; Select[ Range[0, 89168], fQ[ # ] && ! PalindromeQ[ # ] &]

CROSSREFS

Cf. A000787, A007597, A018848, A029742, A006072, A153806, A169731.

Sequence in context: A039434 A043257 A044037 * A111065 A227271 A004237

Adjacent sequences:  A287089 A287090 A287091 * A287093 A287094 A287095

KEYWORD

nonn,base

AUTHOR

Ilya Gutkovskiy, May 19 2017

STATUS

approved

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Last modified January 25 05:31 EST 2021. Contains 340416 sequences. (Running on oeis4.)