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A150031 as a simple table

na(n)
01
12
26
316
462
5209
6826
72884
812327
946607
10197833
11754220
123343667
1313318517
1458434940
15233005648
161052872124
174322695836
1819330561228
1979239584849
20362301103486
211517546326245
226870981921627
2328703048456221
24132297147943855
25562147041928433
262567582959610258
2710875375405053705

[1,2,6,16,62,209,826,2884,12327,46607,197833,
 754220,3343667,13318517,58434940,233005648,
 1052872124,4322695836,19330561228,79239584849,
 362301103486,1517546326245,6870981921627,
 28703048456221,132297147943855,562147041928433,
 2567582959610258,10875375405053705]