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A133043
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Number of segments needed to draw the spiral of equilateral triangles with side lengths which follow the Padovan sequence.
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1
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3, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (2,-1).
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FORMULA
| a(1)=3: a(2)=5: a(3)=6; for n>3, a(n)=n+4.
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PROG
| (PARI) a(n)=if(n>3, n+4, [3, 5, 6][n]) \\ Charles R Greathouse IV, Oct 27 2011
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CROSSREFS
| Cf. Padovan sequence: A000931.
Sequence in context: A021741 A201906 A161529 * A094058 A175966 A121882
Adjacent sequences: A133040 A133041 A133042 * A133044 A133045 A133046
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KEYWORD
| easy,nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), Nov 04 2007, Nov 05 2007
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