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Numbers seen as squares with at most one missing digit in decimal representation.
3

%I #3 Mar 30 2012 18:51:04

%S 0,1,2,3,4,5,6,8,9,10,11,12,14,16,19,21,22,24,25,26,28,29,31,32,34,36,

%T 40,41,44,48,49,52,56,57,59,61,62,64,65,66,67,69,72,74,76,78,79,81,84,

%U 89,90,91,96,100,102,104,108,109,115,116,121,122,124,125,126,129,136

%N Numbers seen as squares with at most one missing digit in decimal representation.

%C A157464(a(n)) > 0; A000290(n) is a subsequence;

%C A157466 gives numbers of these numbers <= n, A157466(a(n+1))=A157466(a(n))+1.

%H R. Zumkeller, <a href="/A157465/b157465.txt">Table of n, a(n) for n = 1..1000</a>

%e Insert 5 into 200: 2500=50^2, therefore 200 is a term;

%e insert 4 into 201: 2401=49^2, therefore 201 is a term;

%e append 5 to 202: 2025=45^2, therefore 202 is a term.

%K base,nonn

%O 1,3

%A _Reinhard Zumkeller_, Mar 01 2009