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A303135 as a simple table

na(n)
01
14
2104
31760
439520
5590720
614285056
7205151232
84596467200
975375073280
101504196046848
1123673049726976
12525315968712704
137912159583600640
14158055039529779200
152726833423421800448
1651889395654107463680
17840470097284214292480
1816765991910040314839040

[1,4,104,1760,39520,590720,14285056,205151232,
 4596467200,75375073280,1504196046848,
 23673049726976,525315968712704,7912159583600640,
 158055039529779200,2726833423421800448,
 51889395654107463680,840470097284214292480,
 16765991910040314839040]