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 A203470 Vandermonde permanent of (2,3,4,...,n+1). 5
 1, 5, 210, 105840, 838252800, 129459762432000, 466521199899955200000, 45727437650097816797184000000, 139352822480378029387123167068160000000, 14863555768518278744824500982673408262144000000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Each term divides its successor, as (conjectured) in A102693.  Each term is divisible by the corresponding superfactorial, A000178(n), as in A203471. LINKS MATHEMATICA f[j_] := j + 1; z = 16; v[n_] := Product[Product[f[k] + f[j], {j, 1, k - 1}], {k, 2, n}] d[n_] := Product[(i - 1)!, {i, 1, n}] Table[v[n], {n, 1, z}]              (* A203470   *) Table[v[n + 1]/v[n], {n, 1, z - 1}] (* A102693 ? *) Table[v[n]/d[n], {n, 1, 20}]        (* A203471   *) CROSSREFS Cf. A102693, A203471. Sequence in context: A027682 A006413 A055316 * A165208 A144796 A206457 Adjacent sequences:  A203467 A203468 A203469 * A203471 A203472 A203473 KEYWORD nonn AUTHOR Clark Kimberling, Jan 02 2012 STATUS approved

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