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Multiples of 2 whose digit sum is 2.
22

%I #25 Feb 20 2021 17:24:20

%S 2,20,110,200,1010,1100,2000,10010,10100,11000,20000,100010,100100,

%T 101000,110000,200000,1000010,1000100,1001000,1010000,1100000,2000000,

%U 10000010,10000100,10001000,10010000,10100000,11000000,20000000,100000010,100000100,100001000

%N Multiples of 2 whose digit sum is 2.

%H Alois P. Heinz, <a href="/A069537/b069537.txt">Table of n, a(n) for n = 1..10000</a>

%o (Python)

%o from itertools import product

%o def agen():

%o digits = 1

%o while True:

%o for i in range(digits-2): yield int("1"+"0"*(digits-3-i)+"1"+"0"*i+"0")

%o yield int("2"+"0"*(digits-1))

%o digits += 1

%o g = agen()

%o print([next(g) for i in range(32)]) # _Michael S. Branicky_, Feb 20 2021

%Y Cf. A069521 to A069530, A069532, A069534, A069536.

%Y Subsequence of A005349.

%Y Row n=2 of A245062.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, Apr 01 2002

%E Corrected and extended by _Ray Chandler_, Sep 28 2003