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A134439 Numbers n with property that for each digit d from 1 to 9, we can also see the decimal expansion of d^2 as a substring of n. 7

%I #7 Jan 24 2022 07:58:17

%S 2536497816,2536498167,2536781649,2536816497,2573649816,2573681649,

%T 2578163649,2578164936,2581636497,2581649367,2581649736,2581673649,

%U 3625781649,3625816497,3649257816,3649258167,3649725816,3649781625

%N Numbers n with property that for each digit d from 1 to 9, we can also see the decimal expansion of d^2 as a substring of n.

%H David Applegate, <a href="/A134439/b134439.txt">Table of n, a(n) for n = 1..300</a>

%e In the first number, for 2 we can see 4, for 5 we can see 25, for 3 we can see 9, for 6 we can see 36, for 4 we can see 16, for 9 we can see 81, for 8 we can see 64, for 1 we can see 1 and for 7 we can see 49.

%o For C++ program see the Applegate link in A135463.

%Y Cf. A134692, A134698, A134962.

%K nonn,base

%O 1,1

%A _Zak Seidov_, Feb 02 2008

%E Corrected by _David Applegate_, Feb 09 2008

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)