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A037670
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Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 3,2,0.
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1
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3, 23, 161, 1130, 7912, 55384, 387691, 2713839, 18996873, 132978114, 930846800, 6515927600, 45611493203, 319280452423, 2234963166961, 15644742168730, 109513195181112, 766592366267784, 5366146563874491
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OFFSET
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1,1
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LINKS
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FORMULA
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a(1)=3, a(2)=23, a(3)=161, a(4)=1130, a(n)=7*a(n-1)+a(n-3)-7*a(n-4) [From Harvey P. Dale, Oct 15 2011]
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MATHEMATICA
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With[{nn=10}, Table[FromDigits[Take[PadLeft[{}, 3nn, {3, 2, 0}], n], 7], {n, 3nn}]] (* or *) LinearRecurrence[{7, 0, 1, -7}, {3, 23, 161, 1130}, 30] (* Harvey P. Dale, Oct 15 2011 *)
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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