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Characteristic function of magic numbers A018226: 1 if n is a magic number else 0.
3

%I #9 Dec 30 2018 00:03:21

%S 0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,

%T 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

%U 0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1

%N Characteristic function of magic numbers A018226: 1 if n is a magic number else 0.

%C Sequence related to atomic nuclei.

%H Antti Karttunen, <a href="/A162518/b162518.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Ch#char_fns">Index entries for characteristic functions</a>

%o (PARI) A162518(n) = if(n<1, 0, polcoeff( x^126+x^82+x^50+x^28+x^20+x^8+x^2, n)); \\ _Antti Karttunen_, Dec 24 2018, after code in A089011

%Y Cf. A018226, A130517, A130556, A130598, A130602, A162519, A162521, A162522, A162523, A162524, A162525.

%K nonn

%O 1,1

%A _Omar E. Pol_, Jul 07 2009

%E Data section extended up to a(126) by _Antti Karttunen_, Dec 24 2018