A193317 Binomial(n,2)*B(n-1)*(B(n)-B(n-1)), where B() = A000110() are the Bell numbers.
0, 0, 1, 18, 300, 5550, 117780, 2873262, 80126228, 2534723280, 90239747220, 3588582531875, 158318375911740, 7700793136255440, 410691133882551795, 23894146232727414630, 1509723335738373490800, 103169903975944947302744, 7597003720932150826636260, 600748548233457344454385722
Offset: 0
Keywords
Links
- Frank Ruskey and Jennifer Woodcock, The Rand and block distances of pairs of set partitions, Combinatorial algorithms, 287-299, Lecture Notes in Comput. Sci., 7056, Springer, Heidelberg, 2011.
Programs
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Mathematica
Table[Binomial[n, 2]*BellB[n - 1] (BellB[n] - BellB[n - 1]), {n, 19}] (* Michael De Vlieger, Apr 16 2015 *)
Comments