[seqfan] a(n+1) is the multiple of at least one digit of a(n)
Eric Angelini
Eric.Angelini at kntv.be
Tue May 28 16:46:07 CEST 2013
Hello SeqFans,
I guess this is a permutation of the Naturals:
a(n+1) is the smallest integer not yet in the sequence such that
a(n+1) is the multiple of at least one digit of a(n):
S=1,2,4,8,16,3,6,12,5,10,7,14,9,18,11,13,15,17,19,20,22,24,...
[22 is in S because 22 is 11 times 2 -- this 2 being a digit of
20; 22 is the smallest available integer because 21 is neither
a multiple of 2 or a multiple of 0]
Best,
É.
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