OFFSET
1,3
COMMENTS
Conjecture: (-1)^(n-1)*a(n) > 0 for all n > 1, and |a(n)|^{1/n} tends to the infinity.
LINKS
Zhi-Wei Sun, Table of n, a(n) for n = 1..150
EXAMPLE
a(1) = 0 since p_1 - p_1 = 2 - 2 = 0.
MATHEMATICA
a[n_]:=Det[Table[Abs[Prime[i]-Prime[j]], {i, 1, n}, {j, 1, n}]]
Table[a[n], {n, 1, 20}]
CROSSREFS
KEYWORD
sign
AUTHOR
Zhi-Wei Sun, Aug 30 2013
STATUS
approved