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Search: id:A002671
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| A002671 |
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4^n*(2*n+1)!.
(Formerly M5174 N2246)
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+0
2
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| 1, 24, 1920, 322560, 92897280, 40874803200, 25505877196800, 21424936845312000, 23310331287699456000, 31888533201572855808000, 53572735778642397757440000, 108431217215972213061058560000
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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H. E. Salzer, Tables of coefficients for obtaining central differences from their derivatives, Journal of Mathematics and Physics, 42 (1963), 162-165. Note that there is a mistake in the definition of this sequence on line 2 of page 164.
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PROGRAM
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(PARI) a(n)=4^n*(2*n+1)!
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CROSSREFS
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A002671(n) = A002866(2n+1).
Adjacent sequences: A002668 A002669 A002670 this_sequence A002672 A002673 A002674
Sequence in context: A084224 A123794 A006685 this_sequence A003738 A001501 A054005
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KEYWORD
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nonn,easy
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AUTHOR
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njas, Simon Plouffe (simon.plouffe(AT)gmail.com)
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EXTENSIONS
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More terms from Michael Somos
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