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Search: id:A047355
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| A047355 |
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Numbers that are congruent to {0, 3} mod 7. |
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+0
2
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| 0, 3, 7, 10, 14, 17, 21, 24, 28, 31, 35, 38, 42, 45, 49, 52, 56, 59, 63, 66, 70, 73, 77, 80, 84, 87, 91, 94, 98, 101, 105, 108, 112, 115, 119, 122, 126, 129, 133, 136, 140, 143, 147, 150, 154, 157, 161, 164, 168, 171, 175, 178, 182, 185, 189, 192, 196, 199, 203
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n) = a(n - 2) + 7 = a(n - 1) + a(n - 2) - a(n - 3) - Henry Bottomley (se16(AT)btinternet.com), Jan 19 2001
a(n)=7*n-a(n-1)-11 (with a(1)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 23 2009]
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EXAMPLE
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For n=2, a(2)=7*2-0-11=3; n=3, a(3)=7*3-3-11=7; n=4, a(4)=7*4-7-11=10 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 23 2009]
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CROSSREFS
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Cf. A030123.
Sequence in context: A081842 A160591 A027704 this_sequence A098005 A003231 A140487
Adjacent sequences: A047352 A047353 A047354 this_sequence A047356 A047357 A047358
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KEYWORD
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nonn,new
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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