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A000424 Differences of reciprocals of unity.
(Formerly M4448 N1883)
3
7, 85, 1660, 48076, 1942416, 104587344, 7245893376, 628308907776, 66687811660800, 8506654697548800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

F. N. David, M. G. Kendall and D. E. Barton, Symmetric Function and Allied Tables, Cambridge, 1966, p. 228.

M. Merca, Some experiments with complete and elementary symmetric functions, - Periodica Mathematica Hungarica, 69 (2014), 182-189.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..10.

MATHEMATICA

T[n_, k_] := If[k <= n, (n-k+2)!^k*Sum[(-1)^(j+1)*Binomial[n-k+2, j]/j^k, {j, 1, n-k+2}], 0]; a[n_] := T[n+1, 2]; Table[a[n], {n, 1, 10}] (* Jean-François Alcover, Feb 08 2016, after Alois P. Heinz in A008969 *)

CROSSREFS

Essentially the same as A060237.

Column 2 in triangle A008969.

Sequence in context: A049412 A056547 A121020 * A060237 A207214 A000686

Adjacent sequences:  A000421 A000422 A000423 * A000425 A000426 A000427

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified May 25 12:08 EDT 2017. Contains 287027 sequences.