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A045574
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Numbers that are still numbers when turned upside down (uses only digits 0, 1, 6, 8, 9 with no final 0's).
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12
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0, 1, 6, 8, 9, 11, 16, 18, 19, 61, 66, 68, 69, 81, 86, 88, 89, 91, 96, 98, 99, 101, 106, 108, 109, 111, 116, 118, 119, 161, 166, 168, 169, 181, 186, 188, 189, 191, 196, 198, 199, 601, 606, 608, 609, 611, 616, 618, 619, 661, 666, 668, 669, 681, 686, 688, 689, 691, 696, 698, 699
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graph;
refs;
listen;
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OFFSET
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1,3
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COMMENTS
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"No final 0's" means that the rotated number should not have leading zeros; the single digit of the number 0 itself is not considered as such.
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LINKS
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PROG
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(PARI) is_A045574(n)=n%10 & !setminus(Set(Vec(Str(n))), Vec("01689")) || !n \\ M. F. Hasler, May 04 2012
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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