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 A104470 Tribonacci-equivalent of mousetrap sequence (A002467). 0
 1, 1, 1, 9, 44, 270, 1938, 15764, 143776, 1453302, 16128420, 194980478, 2550746400, 35904118874, 541097840528, 8693290587030, 148324680742912, 2678504175897990, 51039398650102776, 1023458322628129882 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS The mousetrap sequence (A002467) can be defined in a Fibonacci-like way as: a(0) = a(1) = 1; for n>1 a(n) = n*(a(n-1)+a(n-2)). The current sequence is thus the tribonacci-equivalent of that. LINKS FORMULA a(0) = a(1) = a(2) = 1; for n>2 a(n) = n*(a(n-1)+a(n-2)+a(n-3)). CROSSREFS Cf. A002467. Sequence in context: A034558 A144109 A099867 * A084016 A221508 A125679 Adjacent sequences:  A104467 A104468 A104469 * A104471 A104472 A104473 KEYWORD easy,nonn AUTHOR Jonathan Vos Post, Mar 09 2005 STATUS approved

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