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A242038 Integer part of square root of A010809(n) = n^21.

%I A242038 #38 Dec 17 2024 15:18:00
%S A242038 0,1,1448,102275,2097152,21836601,148111277,747359260,3037000499,
%T A242038 10460353203,31622776601,86024705429,214488041413,497055861119,
%U A242038 1082291816449,2233357359474,4398046511104,8312155792152,15148209527700,26724698233906
%N A242038 Integer part of square root of A010809(n) = n^21.
%H A242038 Karl V. Keller, Jr., <a href="/A242038/b242038.txt">Table of n, a(n) for n = 0..1000</a>
%F A242038 a(n) = floor(sqrt(n^21)).
%e A242038 For n = 4, floor(sqrt(4^21)) = 2097152.
%o A242038 (Python)
%o A242038 from decimal import *
%o A242038 getcontext().prec = 100
%o A242038 for n in range(0,1001): print(int(Decimal(n**21).sqrt()))
%o A242038 (PARI) a(n) = sqrtint(n^21) \\ _Michel Marcus_, Oct 01 2014
%Y A242038 Cf. A010809 (n^21).
%K A242038 nonn
%O A242038 0,3
%A A242038 _Karl V. Keller, Jr._, Oct 01 2014