%I #9 Aug 28 2017 12:41:34

%S 10,20,30,32,33,40,45,47,48,49,50,51,52,53,55,60,64,70,71,78,80,84,90,

%T 95,97,98,99,100,101,102,103,104,105,110,120,130,138,140,142,143,144,

%U 145,147,148,149,150,151,152,153,155,160,170,174,175,176,179,180

%N Numbers k such that 0 is the smallest decimal digit of k^2.

%e 47 is in the sequence because 47^2 = 2209, the smallest decimal digit of which is 0.

%o (PARI) select(k->vecmin(digits(k^2))==0, vector(1000, k, k))

%o (Python)

%o A291625_list = [k for k in range(1,10**6) if '0' in str(k**2)] # _Chai Wah Wu_, Aug 28 2017

%Y Cf. A291626, A291627, A291628, A291629, A291630, A291631.

%K nonn,base

%O 1,1

%A _Colin Barker_, Aug 28 2017