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Square array T(n,k) = number of plane partitions of n with parts colored in (at most) k colors; n, k >= 1; read by antidiagonals.
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%I #26 Sep 26 2018 15:27:02

%S 1,2,3,3,10,6,4,21,34,13,5,36,102,122,24,6,55,228,525,378,48,7,78,430,

%T 1540,2334,1242,86,8,105,726,3605,8964,11100,3690,160,9,136,1134,7278,

%U 25980,56292,47496,11266,282,10,171,1672,13237,62574,203280,316388,210756,32666,500,11,210,2358,22280,132258,586878,1417530

%N Square array T(n,k) = number of plane partitions of n with parts colored in (at most) k colors; n, k >= 1; read by antidiagonals.

%C One could have included a row 0 with all 1's, since there is exactly one partition of n = 0, the empty sum, for which all terms (since there are none) are colored in one among k colors.

%H Alois P. Heinz, <a href="/A306101/b306101.txt">Antidiagonals n = 1..50, flattened</a>

%F T(n,k) = Sum_{j=1..n} A091298(n,j)*k^j.

%e The array starts:

%e [ 1 2 3 4 5 ...] = A000027

%e [ 3 10 21 36 55 ...] = A014105

%e [ 6 34 102 228 430 ...] = A067389

%e [ 13 122 525 1540 3605 ...]

%e [ 24 378 2334 8964 25980 ...]

%e [ 48 1242 11100 56292 203280 ...]

%e A000219 A306099 A306093 A306094 A306094

%e For concrete examples, see A306099 and A306093.

%o (PARI) A306101(n,k)=sum(j=1,n,A091298(n,j)*k^j)

%Y Cf. A091298, A208447, A000219, A000027, A014105, A067389.

%Y See A306100 for a variant.

%Y Cf. A000219, A306099, A306093, A306094, A306095 for columns 1..5.

%K nonn,tabl

%O 1,2

%A _M. F. Hasler_, Sep 22 2018