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A226452 as a simple table

na(n)
01
12
22
34
46
512
620
736
862
9116
10204
11364
12664
131220
142240
154132
167646
1714244
1826644
1949984
2094132
21177788
22336756
23639720
241218228
252325048
264446776
278520928
2816356260
2931447436
3060552616
31116753948
32225404486
33435677408
34843029104
351632918624
363165936640

[1,2,2,4,6,12,20,36,62,116,204,364,664,1220,2240,
 4132,7646,14244,26644,49984,94132,177788,336756,
 639720,1218228,2325048,4446776,8520928,16356260,
 31447436,60552616,116753948,225404486,435677408,
 843029104,1632918624,3165936640]