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Search: id:A112417
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| A112417 |
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Sequence is generated as in A048985, but primes are instead written in decreasing order before being concatenated. |
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+0
1
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| 1, 2, 3, 10, 5, 14, 7, 42, 15, 22, 11, 58, 13, 30, 23, 170, 17, 62, 19, 90, 31, 46, 23, 234, 45, 54, 63, 122, 29, 94, 31, 682, 47, 70, 61, 250, 37, 78, 55, 362, 41, 126, 43, 186, 95, 94, 47, 938, 63, 182, 71, 218, 53, 254, 93, 490, 79, 118, 59, 378, 61, 126, 127, 2730
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Diana Mecum, Table of n, a(n) for n = 1..847
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EXAMPLE
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12 = 3 * 2^2, with prime divisors written in descending order.
So we have 3 = 11 binary, 2 = 10 binary, 2 = 10 binary, which is (after concatenation) 111010. So a(12) is 111010 = 58 when converted from binary to decimal.
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CROSSREFS
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Cf. A004676, A048985.
Sequence in context: A031275 A119023 A048985 this_sequence A139693 A064946 A078730
Adjacent sequences: A112414 A112415 A112416 this_sequence A112418 A112419 A112420
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KEYWORD
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base,nonn
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), Dec 09 2005
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EXTENSIONS
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More terms from Diana Mecum (diana.mecum(AT)gmail.com), Jul 14 2007
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