[seqfan] Re: Divisibility by primes
Lars Blomberg
lars.blomberg at visit.se
Fri Apr 10 16:53:20 CEST 2015
Hello,
I find the first few terms to be
12, 14, 42, 55, 154, 222, 228, 714, 1122, 1196, 1212, 1414, 2112, 2142, 2262, 3355, 4144, 4242, 5335, 5544, 5555, 6162, 9499, 11112, 11144, 11214, 11424, 11466, 11622, 11818, 11914, 12222, 12882, 14112, 15554, 16666, 21216, 21222, 21252, 21888, 22122, 22212, 22287, 24255, 24444, 25212, 41174, 41244, 41412, 44114, 44142, 44226, 44744, 47124, 48944, 53625, 55385, 57222, 62166, 62244, 63635, 66222, 66612, 67626, 68666, 69966, 72114, 72267, 72777, 75735, 77112, 81282, 84854, 85272, 88122, 88844, 99222, 99912, 99935, 111188, 111222, 112122, 112212, 112224, 114114, 116116, 118218, 119922, 121122, 121182, 121212, 121422, 121992, 122112, 122226, 122616, 124488, 126126, 129444, 141414, 142212, 142422, 142842, 144144, 146146, 148428, 154154, 156156, 161226, 161616, 161772, 162162, 164164, 166166, 182172, 182286, 188518, 211122, 211128, 211212, 211692, 211812, 212112, 212142, 212772, 214242, 216216, 221112, 221214, 221424, 221844, 222222, 222255, 222552, 222585, 222612, 224112, 225225, 225522, 225555, 226122, 226512, 228228, 228855, 241122, 242214, 242424, 242949, 244188, 246246, 252252, 255222, 255255, 255552, 261222, 261612, 262626, 264264, 265122,
And
a[1000] = 11299992
a[10000] = 555114252
/Lars
-----Ursprungligt meddelande-----
Från: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] För Eric Angelini
Skickat: den 10 april 2015 13:02
Till: Sequence Discussion list
Ämne: [seqfan] Divisibility by primes
Hello SeqFans,
12 is divisible by the 1st and the 2nd prime
14 is divisible by the 1st and the 4th prime
42 is divisible by the 4th and the 2nd prime ...
Are there many others?
(yes, an infinity: 222, 222222, 222222222, etc) Best, É.
Catapulté de mon aPhone
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