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A321309 as a simple table

na(n)
01
11
21
33
47
515
629
754
8102
9197
10375
11687
121226
132182
143885
156828
1611767
1719971
1833519
1955525
2090293
21143350
22221149
23329472
24467362
25611441
26683794
27487644
28-425932
29-3026915
30-9327152
31-23364105
32-53026834
33-113415526
34-232986460
35-464621237
36-905199293

[1,1,1,3,7,15,29,54,102,197,375,687,1226,2182,
 3885,6828,11767,19971,33519,55525,90293,143350,
 221149,329472,467362,611441,683794,487644,-425932,
 -3026915,-9327152,-23364105,-53026834,-113415526,
 -232986460,-464621237,-905199293]