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A092259
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Numbers that are congruent to {4, 8} mod 12.
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3
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4, 8, 16, 20, 28, 32, 40, 44, 52, 56, 64, 68, 76, 80, 88, 92, 100, 104, 112, 116, 124, 128, 136, 140, 148, 152, 160, 164, 172, 176, 184, 188, 196, 200, 208, 212, 220, 224, 232, 236, 244, 248, 256, 260, 268, 272, 280, 284, 292, 296, 304, 308, 316, 320, 328, 332
(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 (1,1,-1)
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FORMULA
| G.f. 4*x*(1+x+x^2) / ( (1+x)*(x-1)^2 ).
a(n) = 4*A001651(n).
Iff phi[n]=phi[3n/2], then n is in A069587. - Labos E. (labos(AT)ana.sote.hu), Feb 25 2004
a(n)=12*(n-1)-a(n-1) (with a(1)=4) [From Vincenzo Librandi, Nov 16 2010]
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CROSSREFS
| Fourth row of A092260.
Sequence in context: A143718 A031399 A076488 * A036693 A181471 A129370
Adjacent sequences: A092256 A092257 A092258 * A092260 A092261 A092262
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KEYWORD
| nonn,easy
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AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Feb 19 2004
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EXTENSIONS
| Edited and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Feb 21 2004
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