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A065781 a(1) = 25; for n > 1 is a(n) the smallest integer > 0 such that the concatenation a(n)a(n-1)...a(2)a(1) is a square. 2

%I

%S 25,2,1,8,162,70771,164268122,22882298366163557088,

%T 976324672198183536165095004791768497036,

%U 67395729561035485747722358417684895847812434249174374011671902126543092988774

%N a(1) = 25; for n > 1 is a(n) the smallest integer > 0 such that the concatenation a(n)a(n-1)...a(2)a(1) is a square.

%Y Cf. A061359, A065691, A061839, A065780.

%K base,nonn

%O 1,1

%A _Klaus Brockhaus_, Nov 19 2001

%E More terms from Ulrich Schimke (ulrschimke(AT)aol.com), Dec 18 2001

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Last modified January 23 14:34 EST 2022. Contains 350512 sequences. (Running on oeis4.)