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A327998 as a simple table

na(n)
01
11
24
336
436
5900
6400
719600
84900
9396900
1063504
117683984
12853776
13144288144
1411778624
152650190400
16165636900
1747869064100
182363904400
19853369488400
2034134779536
2115053437775376
22497634306624
23263248548204096
247312459672336
254570287295210000
26108172480360000

[1,1,4,36,36,900,400,19600,4900,396900,63504,
 7683984,853776,144288144,11778624,2650190400,
 165636900,47869064100,2363904400,853369488400,
 34134779536,15053437775376,497634306624,
 263248548204096,7312459672336,4570287295210000,
 108172480360000]