[seqfan] Re: Divisibility by primes

[Lars Blomberg]

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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