[seqfan] Re: Any digit of a(n) is visible in a(n)'s factorization

[Lars Blomberg]

Hello,

Only composite numbers are considered.

155 =	5 * 31 is also a term.

A few more terms:
22, 33, 55, 77, 95, 122, 132, 155, 202, 222, 272, 303, 312, 322, 326, 332, 333, 344, 366, 399, 505, 515, 555, 707, 731, 735, 777, 912, 955, 973, 995, 1010, 1030, 1070, 1090, 1111, 1112, 1122, 1131, 1133, 1155, 1173, 1177, 1192, 1197, 1199, 1202, 1212, 1222

/Lars

-----Ursprungligt meddelande-----
Från: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] För Eric Angelini
Skickat: den 29 april 2015 13:26
Till: Sequence Fanatics Discussion list
Ämne: [seqfan] Any digit of a(n) is visible in a(n)'s factorization

Hello SeqFans,
I'm not sure this is new:

> Any digit of a(n) is visible in a(n)'s factorization

A few examples:

22 = 2*11
33 = 3*11
55 = 5*11
77 = 7*11
95 = 5*19
122 = 2*61
132 = 2*2*3*11
202 = 2*101
...

Best,
É.





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