|
| |
|
|
A109030
|
|
10-almost primes (A046314) whose digit reversal is different and also has 10 prime factors (with multiplicity). "Emirp Tsolma-10.".
|
|
3
| |
|
|
46848, 84864, 217152, 219456, 232848, 251712, 257664, 259776, 274104, 276048, 401472, 415584, 422820, 428160, 428736, 447360, 466752, 485514, 637824, 650160, 654912, 677952, 808320, 840672, 846369, 848232, 963648
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| This sequence is the k = 10 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).
The Mathematica code for this was written by Ray Chandler who extended this sequence. He also has more values.
|
|
|
REFERENCES
| Jonathan Vos Post, "1066 and All That: Emirp Tsolma-3 and Related Integer Sequences." Forthcoming paper on this sequence.
|
|
|
LINKS
| Eric Weisstein's World of Mathematics, Almost Prime.
Eric Weisstein's World of Mathematics, Emirp.
Eric Weisstein and Jonathan Vos Post, Emirpimes.
|
|
|
EXAMPLE
| a(1) = 46848 is in this sequence because 46848 = 2^8 * 3 * 61 is a 10-almost prime and reverse(46848) = 84864 = 2^7 * 3 * 13 * 17 is also a 10-almost prime.
|
|
|
CROSSREFS
| Cf. A046314, A006567, A097393, A109018, A109023-A109029, A109031-A109131.
Sequence in context: A205474 A171103 A066359 * A093223 A183601 A206252
Adjacent sequences: A109027 A109028 A109029 * A109031 A109032 A109033
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| Jonathan Vos Post (jvospost3(AT)gmail.com), Jun 16 2005
|
| |
|
|
