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A075184
One half of fourth column of triangle A075181.
1
3, 50, 675, 8820, 117600, 1632960, 23814000, 365904000, 5927644800, 101189088000, 1818030614400, 34326452160000, 679990671360000, 14108934647808000, 306113492805120000, 6933770723303424000
OFFSET
0,1
COMMENTS
Also one half of fourth diagonal of unsigned triangle A048594.
FORMULA
a(n) = A075181(n+4, 3)/2 = |A048594(n+4, n+1)|/2, n>=0.
a(n) = -(n+1)!*S1(n+4, n+1)/2 with S1(n, m) := A008275(n, m) (Stirling1).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Sep 19 2002
STATUS
approved