A058427 - OEIS

%I #8 Aug 11 2024 14:41:33

%S 3,47,173,547,1703,538703,1731828227423,94916921673747,

%T 96385117673990673,151400161921673747

%N Numbers k such that k^2 contains only digits {0,2,9}, not ending with zero.

%H P. De Geest, <a href="https://www.worldofnumbers.com/threedigits.htm">Index to related sequences</a>

%H Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#029">Sporadic tridigital solutions</a>

%Y Cf. A058428.

%K nonn,base,more

%O 1,1

%A _Patrick De Geest_, Nov 15 2000

%E a(10) from Herman Jamke (hermanjamke(AT)fastmail.fm), Mar 30 2008