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A010687
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Repeat (1,6): Period 2.
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4
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1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Continued fraction for (3+sqrt(15))/6 . - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Sep 25 2006
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FORMULA
| G.f. (1+6*x)/(1-x^2) - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Sep 25 2006
a(n)=5/2*(-1)^n+7/2 a(n)=6*(n mod 2)+(n+1) mod 2 - Paolo P. Lava (paoloplava(AT)gmail.com), Oct 20 2006
a(n)=6^n mod 7. [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Nov 26 2009]
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PROG
| (Other) sage: [power_mod(6, n, 7)for n in xrange(0, 100)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Nov 26 2009]
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CROSSREFS
| Sequence in context: A193239 A023406 A138116 * A176355 A109918 A096956
Adjacent sequences: A010684 A010685 A010686 * A010688 A010689 A010690
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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