OFFSET
1,3
EXAMPLE
a(3) = -4 =
|.1..1..2|
|.3..5..7|
|11.15.22|.
MATHEMATICA
nmax = 15; Table[Det[Table[PartitionsP[k*(i-1) + j-1], {i, 1, k}, {j, 1, k}]], {k, 1, nmax}] (* Vaclav Kotesovec, Feb 24 2019 *)
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Jonathan Vos Post, May 27 2006
EXTENSIONS
More terms from Vaclav Kotesovec, Feb 24 2019
STATUS
approved