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A109031
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11-almost primes (A069272) whose digit reversal is different and also has 11 prime factors (with multiplicity). "Emirp Tsolma-11.".
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3
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295245, 426816, 542592, 618624, 2112480, 2116224, 2150064, 2154816, 2196000, 2302560, 2327616, 2342277, 2388672, 2555280, 2576896, 2599200, 2768832, 2952288, 2952576, 4017216, 4074240, 4074840, 4076160, 4076568, 4078848
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| This sequence is the k = 11 instance of the series which begins with k = 1 (emirps), k = 2 (emirpimes), k = 3 (emirp tsolma-3 = A109023), k = 4 (emirp tsolma-4 = A109024), k = 5 (emirp tsolma-5 = A109025), k = 6 (emirp tsolma-6 = A109026), k = 7 (emirp tsolma-7 = A109027), k = 8 (emirp tsolma-8 = A109028), k = 9 (emirp tsolma-9 = A109029), k = 10 (emirp tsolma-10 = A109030).
The Mathematica code for this was written by Ray Chandler who extended this sequence. He also has more values.
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REFERENCES
| Jonathan Vos Post, "1066 and All That: Emirp Tsolma-3 and Related Integer Sequences." Forthcoming paper on this sequence.
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LINKS
| Eric Weisstein's World of Mathematics, Almost Prime.
Eric Weisstein's World of Mathematics, Emirp.
Eric Weisstein and Jonathan Vos Post, Emirpimes.
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EXAMPLE
| a(1) = 295245 is in this sequence because 295245 = 3^10 * 5 is an 11-almost prime and reverse(295245) = 542592 = 2^7 * 3^3 * 157 is also an 11-almost prime.
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CROSSREFS
| Cf. A069272, A006567, A097393, A109018, A109023-A109030.
Sequence in context: A178997 A206237 A023351 * A137817 A137818 A164946
Adjacent sequences: A109028 A109029 A109030 * A109032 A109033 A109034
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KEYWORD
| nonn,base
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AUTHOR
| Jonathan Vos Post (jvospost3(AT)gmail.com), Jun 16 2005
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EXTENSIONS
| a(5)-a(25) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Apr 09 2010
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