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A303260 as a simple table

na(n)
01
11
24
328
4273
53421
652288
7941578
819505545
9456790123
1011931215316
11343871642632
1210840081272265
13371026432467913
1413702802011918048
15543154131059225686
1623000016472483168305
171036227971225610466711
1849492629462587441963140
192497992686980609418282548
20132849300060919364474261281

[1,1,4,28,273,3421,52288,941578,19505545,
 456790123,11931215316,343871642632,10840081272265,
 371026432467913,13702802011918048,
 543154131059225686,23000016472483168305,
 1036227971225610466711,49492629462587441963140,
 2497992686980609418282548,
 132849300060919364474261281]