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A271181 as a simple table

na(n)
00
11
24
39
46
51
65
72
86
93
109
114
124
136
141
158
161
171
182
191
204
214
221
239
246
251
266
279
281
295
302
312
326
335
342
359
368
372
384
392
403
411
426
433
444

[0,1,4,9,6,1,5,2,6,3,9,4,4,6,1,8,1,1,2,1,4,4,1,9,
 6,1,6,9,1,5,2,2,6,5,2,9,8,2,4,2,3,1,6,3,4]