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A059592 Square-full part of n^2+1. 9

%I

%S 1,1,1,1,1,1,1,5,1,1,1,1,1,1,1,1,1,1,5,1,1,1,1,1,1,1,1,1,1,1,1,1,5,1,

%T 1,1,1,1,17,1,1,29,1,5,1,1,1,1,1,1,1,1,1,1,1,1,1,5,1,1,1,1,1,1,1,1,1,

%U 1,5,1,13,1,1,1,1,1,1,1,1,1,1,1,5,1,1,1,1,1,1,1,1,1,1,5,1,1,1,1,1,13,1,1,1

%N Square-full part of n^2+1.

%C a(n)=A000188[n^2+1], A059591[n]*a(n)^2 = n^2+1 Related to period-1 continued fractions [z,z,z,...]

%C A124808 gives number of numbers m<=n with a(m)=1. - _Reinhard Zumkeller_, Nov 08

%H R. Zumkeller, <a href="/A059592/b059592.txt">Table of n, a(n) for n = 0..1000</a>

%e a(7)=5 since 7^2+1 = 50 = 25*2 = (5^2)*2

%Y A000188, A059591, A007913.

%Y Cf. A002522.

%K easy,nonn

%O 0,8

%A _Marc LeBrun_, Jan 25 2001

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Last modified August 2 11:23 EDT 2021. Contains 346422 sequences. (Running on oeis4.)