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A126755
Braille numberdromes: numbers which read the same backwards and forwards in Braille.
0
1, 2, 3, 7, 11, 22, 33, 46, 59, 64, 77, 80, 95, 111, 121, 131, 161, 171, 212, 222, 232, 262, 272, 313, 323, 333, 373, 416, 426, 436, 476, 519, 529, 539, 579, 614, 624, 634, 674, 717, 727, 737, 777, 810, 820, 830, 870, 915, 925, 935, 975
OFFSET
1,2
COMMENTS
The pairs 4 and 6, 5 and 9 and 0 and 8 are mirror images of each other. When a Braille number is read backward (as a mirror-image) the number is usually not the same as the original. Those that are the same could be called by analogy with the ordinary numberdromes the Braille numberdromes. Those with "a double yolk", such as 1081, would be Braille numberddromes, by analogy with palinddromes.
EXAMPLE
a(8) = 46 because in Braille 4 and 6 are mirror images of each other.
CROSSREFS
Cf. A121018.
Sequence in context: A034431 A339610 A095766 * A228592 A034795 A165318
KEYWORD
easy,nonn,base
AUTHOR
Michael Joseph Halm, Apr 23 2007
STATUS
approved