A385715 Square array read by descending antidiagonals: A(n,k) is the number of fixed n-dimensional (n,2)-polyominoids, n >= 2, of size k >= 1.
1, 2, 3, 6, 18, 6, 19, 158, 60, 10, 63, 1611, 916, 140, 15, 216, 17811, 16698, 3060, 270, 21, 760, 207395, 336210, 81090, 7690, 462, 28, 2725, 2505858, 7218768, 2396434, 268005, 16226, 728, 36, 9910, 31125711, 162185112, 76020890, 10477161, 701589, 30408, 1080, 45
Offset: 2
Examples
The top corner of the array (size on horizontal axis, dimensions on vertical):
1 2 3 4 5 6 7 8 9 10
(A001168) 2: 1 2 6 19 63 216 760 2725 9910 36446
(A075678) 3: 3 18 158 1611 17811 207395 2505858 31125711 394982973 5098498323
(A366335) 4: 6 60 916 16698 336210 7218768 162185112 3769221330
5: 10 140 3060 81090 2396434 76020890 2535403620 87781527395
6: 15 270 7690 268005 10477161 441378400 19603138320
7: 21 462 16226 701589 34160301 1796996509
8: 28 728 30408 1570436 91583156
9: 36 1080 52296 3141108 213477012