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A062322 Factorials of nonsquarefree numbers, or A013929(n)!, (including 1). 1

%I #14 Dec 15 2017 17:35:09

%S 1,24,40320,362880,479001600,20922789888000,6402373705728000,

%T 2432902008176640000,620448401733239439360000,

%U 15511210043330985984000000,10888869450418352160768000000

%N Factorials of nonsquarefree numbers, or A013929(n)!, (including 1).

%H Harry J. Smith, <a href="/A062322/b062322.txt">Table of n, a(n) for n = 0..100</a>

%t Select[Range[0,30],!SquareFreeQ[#]&]! (* _Harvey P. Dale_, Aug 27 2016 *)

%o (PARI) for(n=0,38, if(issquarefree(n), n+1,print(n!)))

%o (PARI) { n=-1; for (m=0, 10^9, if (m>0, f*=m, f=1); if (!issquarefree(m), write("b062322.txt", n++, " ", f); if (n==100, break)); ) } \\ _Harry J. Smith_, Aug 04 2009

%Y Cf. A013929.

%K easy,nonn

%O 0,2

%A _Jason Earls_, Jul 05 2001

%E Better name from _Jon E. Schoenfield_, Aug 09 2015

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)