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0, 1, 31, 721, 14911, 289201, 5386591, 97576081, 1732076671, 30276117361, 522861237151, 8942430185041, 151728638820031, 2557404559011121, 42864668012537311, 715027614225987601, 11878335717996660991
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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FORMULA
| a(0)=0, a(n)=15*a(n-1)+16^(n-1). [From Vincenzo Librandi, Feb 09 2011]
a(0)=0, a(1)=1, a(n)=31*a(n-1)-240*a(n-2). [From Vincenzo Librandi, Feb 09 2011]
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CROSSREFS
| base 8: A016177, 4: A005061, 2: A000225, 10: A016189.
Sequence in context: A000565 A014930 A196988 * A096049 A166488 A051587
Adjacent sequences: A061249 A061250 A061251 * A061253 A061254 A061255
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KEYWORD
| nonn,easy
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AUTHOR
| Frank.Ellermann(AT)t-online.de, Jun 05, 2001.
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