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A147832
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Numbers congruent (0,2) mod 14
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0
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0, 2, 14, 16, 28, 30, 42, 44, 56, 58, 70, 72, 84, 86, 98, 100, 112, 114, 126, 128, 140, 142, 154, 156, 168, 170, 182, 184, 196, 198, 210, 212, 224, 226, 238, 240, 252, 254, 266, 268, 280, 282, 294, 296, 308, 310, 322, 324, 336, 338, 350, 352, 364, 366, 378, 380
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (1,1,-1).
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FORMULA
| Except initial term, a(n) = A113801(n-1)+1.
a(n)=14*n-a(n-1)-26 (with a(1)=0). [From Vincenzo Librandi, Dec 17 2010]
G.f.: 2*x^2*(1+6*x)/((1+x)*(1-x)^2). a(n) = 2*A047274(n) = (14*n-5*(-1)^n-19)/2. Also a(n) = 2*( A001106(n-1)-sum[a(i), i=1..n-1] ) for n>1. - Bruno Berselli, Dec 17 2010
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MATHEMATICA
| Flatten[{#, #+2}&/@(14 Range[0, 30])] [From Harvey P. Dale, Dec. 25, 2010]
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CROSSREFS
| Cf. A113801, A047274, A001106.
Sequence in context: A199368 A121716 A194379 * A022369 A096508 A108029
Adjacent sequences: A147829 A147830 A147831 * A147833 A147834 A147835
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KEYWORD
| easy,nonn
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AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Nov 14 2008
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EXTENSIONS
| 382 replaced by 380 - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 28 2010
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