id:A091396 - OEIS Search Results

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Product_{ p | N } (1 + Legendre(2,p) ).

+0
1

1, 1, 0, 1, 0, 0, 2, 1, 0, 0, 0, 0, 0, 2, 0, 1, 2, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 2, 0, 0, 2, 1, 0, 2, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 2, 2, 0, 2, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 2, 0, 1, 0, 0, 0, 2, 0, 0, 2, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 2, 0, 0, 0, 0, 0, 0, 2, 0, 0, 2, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 2, 0, 0 (list; graph; listen)

	OFFSET	`1,7`
	FORMULA	`Multiplicative with a(2^e)=1, a(p^e)=0 if p mod 8=3 or p mod 8=5 and a(p^e)=2 if p mod 8=1 or p mod 8=7. - Vladeta Jovovic (vladeta(AT)eunet.rs), Mar 02 2004`
	MAPLE	`with(numtheory); L := proc(n, N) local i, t1, t2; t1 := ifactors(n)[2]; t2 := mul((1+legendre(N, t1[i][1])), i=1..nops(t1)); end; [seq(L(n, 2), n=1..120)];`
	CROSSREFS	`Cf. A091379.` `Sequence in context: A101108 A017867 A127843 this_sequence A037857 A037875 A057764` `Adjacent sequences: A091393 A091394 A091395 this_sequence A091397 A091398 A091399`
	KEYWORD	`nonn,mult`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Mar 02 2004`

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Last modified December 4 08:07 EST 2009. Contains 170310 sequences.

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