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A237420 as a simple table

na(n)
00
10
22
30
44
50
66
70
88
90
1010
110
1212
130
1414
150
1616
170
1818
190
2020
210
2222
230
2424
250
2626
270
2828
290
3030
310
3232
330
3434
350
3636
370
3838
390
4040
410
4242
430
4444
450
4646
470
4848
490
5050
510
5252
530
5454
550
5656
570
5858
590
6060
610
6262
630
6464
650
6666
670
6868
690
7070
710
7272
730
7474

[0,0,2,0,4,0,6,0,8,0,10,0,12,0,14,0,16,0,18,0,20,
 0,22,0,24,0,26,0,28,0,30,0,32,0,34,0,36,0,38,0,40,
 0,42,0,44,0,46,0,48,0,50,0,52,0,54,0,56,0,58,0,60,
 0,62,0,64,0,66,0,68,0,70,0,72,0,74]