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A037548
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Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,2.
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0
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1, 9, 65, 456, 3194, 22360, 156521, 1095649, 7669545, 53686816, 375807714, 2630654000, 18414578001, 128902046009, 902314322065, 6316200254456, 44213401781194, 309493812468360, 2166456687278521
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OFFSET
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1,2
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LINKS
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FORMULA
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G.f.: x*(1+2*x+2*x^2) / ( (x-1)*(7*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 30 2015
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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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