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A045855 Numbers whose square has initial digit '1'. 6

%I #19 Aug 09 2021 01:36:17

%S 1,4,10,11,12,13,14,32,33,34,35,36,37,38,39,40,41,42,43,44,100,101,

%T 102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,

%U 119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136

%N Numbers whose square has initial digit '1'.

%H N. J. A. Sloane, <a href="/A045855/b045855.txt">Table of n, a(n) for n = 1..20000</a>

%t Select[Range[150],First[IntegerDigits[#^2]]==1&] (* _Harvey P. Dale_, Aug 28 2012 *)

%Y Cf. A045784, A272671.

%K nonn,base

%O 1,2

%A _Jeff Burch_

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Last modified May 21 22:16 EDT 2024. Contains 372741 sequences. (Running on oeis4.)