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A026010 as a simple table

na(n)
01
12
24
37
414
525
650
791
8182
9336
10672
111254
122508
134719
149438
1517875
1635750
1768068
18136136
19260338
20520676
21999362
221998724
233848222
247696444
2514858000
2629716000
2757500460
28115000920
29222981435
30445962870
31866262915
321732525830
333370764540

[1,2,4,7,14,25,50,91,182,336,672,1254,2508,4719,
 9438,17875,35750,68068,136136,260338,520676,
 999362,1998724,3848222,7696444,14858000,29716000,
 57500460,115000920,222981435,445962870,866262915,
 1732525830,3370764540]