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A203428 Reciprocal of Vandermonde determinant of (1/3,1/6,...,1/(3n)). 3
1, -6, -486, 839808, 42515280000, -80335512599040000, -6890065294166289123840000, 31601087581187838970614157148160000, 8925080517850366815864624583251321642024960000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Each term divides its successor, as in A203429.

LINKS

Table of n, a(n) for n=1..9.

MATHEMATICA

f[j_] := 1/(3 j); z = 16;

v[n_] := Product[Product[f[k] - f[j], {j, 1, k - 1}], {k, 2, n}]

1/Table[v[n], {n, 1, z}]                 (* A203428 *)

Table[v[n]/(3 v[n + 1]), {n, 1, z - 1}]  (* A203429 *)

CROSSREFS

Cf. A203429, A203424, A203421.

Sequence in context: A248362 A006712 A248361 * A264741 A197205 A197803

Adjacent sequences:  A203425 A203426 A203427 * A203429 A203430 A203431

KEYWORD

sign

AUTHOR

Clark Kimberling, Jan 02 2012

STATUS

approved

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Last modified January 18 21:06 EST 2021. Contains 340262 sequences. (Running on oeis4.)