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A111989
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G.f.: 1/(1-6*x+8*x^3).
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2
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1, 6, 36, 208, 1200, 6912, 39808, 229248, 1320192, 7602688, 43782144, 252131328, 1451966464, 8361541632, 48152199168, 277297463296, 1596892446720, 9196137086976, 52958442815488, 304975517319168, 1756284007219200
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| Charles Jordan, Calculus of Finite Differences, Chelsea, 1965, p. 43. See the reference to L. Euler there.
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LINKS
| Index entries for sequences related to linear recurrences with constant coefficients
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FORMULA
| A special four-term recurrence.
a(n)= 6*a(n-1)-8*a(n-3), a(-2)= 0 =a(-1), a(0)=1, (or a(j)=6^j, j=0, 1, 2).
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CROSSREFS
| Cf. A111990 (first convolution), A111991 (second convolution).
Sequence in context: A000551 A038157 A006812 * A064238 A014336 A027910
Adjacent sequences: A111986 A111987 A111988 * A111990 A111991 A111992
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KEYWORD
| nonn,easy
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AUTHOR
| Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Sep 12 2005
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