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A049210
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- Product(8*k-1,k=0..n); octo-factorial numbers.
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4
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1, 7, 105, 2415, 74865, 2919735, 137227545, 7547514975, 475493443425, 33760034483175, 2667042724170825, 232032717002861775, 22043108115271868625, 2270440135873002468375, 252018855081903273989625
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| Index entries for sequences related to factorial numbers
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FORMULA
| a(n)= 7*A034975(n) = (8*n-1)(!^8), n >= 1, a(0) := 1.
G.f.: 1/(1-7x/(1-8x/(1-15x/(1-16x/(1-23x/(1-24x/(1-31x/(1-32x/(1-... (continued fraction). - DELEHAM Philippe, Jan 07 2012
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MATHEMATICA
| s=1; lst={s}; Do[s+=n*s; AppendTo[lst, s], {n, 6, 5!, 8}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 08 2008]
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CROSSREFS
| Cf. A008543, A049209, A049211, A049212, A051187.
Sequence in context: A132867 A145666 A096131 * A167814 A002486 A203971
Adjacent sequences: A049207 A049208 A049209 * A049211 A049212 A049213
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KEYWORD
| easy,nonn
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AUTHOR
| Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)
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