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A026702 as a simple table

na(n)
01
11
22
33
45
58
615
726
848
979
10137
11223
12403
13689
141251
152088
163647
176028
1810775
1918386
2033010
2155460
2296916
23161705
24287199
25490430
26873964
271475256
282575673
294325448
307646036
3113072664
3223169478
3339254755
3468456542

[1,1,2,3,5,8,15,26,48,79,137,223,403,689,1251,
 2088,3647,6028,10775,18386,33010,55460,96916,
 161705,287199,490430,873964,1475256,2575673,
 4325448,7646036,13072664,23169478,39254755,
 68456542]