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A020964
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Sum of Floor[ 3*(1+sqrt(2))^(n-k) ] for k from 1 to infinity.
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0
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4, 11, 28, 70, 171, 417, 1010, 2444, 5905, 14263, 34440, 83154, 200759, 484685, 1170142, 2824984, 6820125, 16465251, 39750644, 95966558, 231683779, 559334137, 1350352074, 3260038308, 7870428713, 19000895759
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| C. Kimberling, Problem 10520 in Amer. Math. Mon. 103 (1996) p. 347.
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MATHEMATICA
| Table[t=0; k=0; While[k++; s=Floor[3*(1+Sqrt[2])^(n-k)]; s>0, t= t+s]; t, {n, 26}]
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CROSSREFS
| Sequence in context: A099326 A127985 A005409 * A113067 A152689 A000604
Adjacent sequences: A020961 A020962 A020963 * A020965 A020966 A020967
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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EXTENSIONS
| Revised Feb 03 1999. Revised Nov 30 2010.
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