A091392 - OEIS

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A091392

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

1, 1, 2, 1, 0, 2, 0, 1, 2, 0, 2, 2, 0, 0, 0, 1, 2, 2, 2, 0, 0, 2, 0, 2, 0, 0, 2, 0, 0, 0, 0, 1, 4, 2, 0, 2, 0, 2, 0, 0, 2, 0, 2, 2, 0, 0, 0, 2, 0, 0, 4, 0, 0, 2, 0, 0, 4, 0, 2, 0, 0, 0, 0, 1, 0, 4, 2, 2, 0, 0, 0, 2, 2, 0, 0, 2, 0, 0, 0, 0, 2, 2, 2, 0, 0, 2, 0, 2, 2, 0, 0, 0, 0, 0, 0, 2, 2, 0, 4, 0, 0, 4, 0, 0, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	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: A143614 A071412 A080884 * A036577 A002325 A129134` `Adjacent sequences: A091389 A091390 A091391 * A091393 A091394 A091395`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Mar 02 2004`

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Last modified February 16 14:07 EST 2012. Contains 205930 sequences.