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A118649 as a simple table

na(n)
01
12
25
312
430
574
6184
7456
81132
92808
106968
1117288
1242896
13106432
14264080
15655232
161625760
174033824
1810008704
1924833536
2061616832
21152883328
22379333248
23941199488
242335298816
255794330112
2614376858880
2735671780352
2888508618240

[1,2,5,12,30,74,184,456,1132,2808,6968,17288,
 42896,106432,264080,655232,1625760,4033824,
 10008704,24833536,61616832,152883328,379333248,
 941199488,2335298816,5794330112,14376858880,
 35671780352,88508618240]