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A123932
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a(0)=1, a(n)=4 for n>0.
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4
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1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Continued fraction for sqrt(5)-1.
4^n mod 12. [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Nov 25 2009]
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FORMULA
| a(n)=4-3*0^n . G.f.: (1+3x)/(1-x).
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PROG
| (PARI) a(n)=(n>=0)+3*(n>0) [From Jaume Oliver Lafont (joliverlafont(AT)gmail.com), Mar 26 2009]
(Other) sage: [power_mod(4, n, 12)for n in xrange(0, 84)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Nov 25 2009]
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CROSSREFS
| Sequence in context: A136213 A088848 A088849 * A010709 A138908 A032564
Adjacent sequences: A123929 A123930 A123931 * A123933 A123934 A123935
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KEYWORD
| cofr,nonn
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AUTHOR
| Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 28 2006
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