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A252697 as a simple table

na(n)
00
14
212
336
4132
5492
61932
77596
830252
9120516
10481572
111924356
127695492
1330774372
14123089892
15492329316
161969287012
177877027532
1831507989612
19126031476876
20504125425932
212016499779372
228065997193132
2332263981077036
24129055916612652
25516223635676236

[0,4,12,36,132,492,1932,7596,30252,120516,481572,
 1924356,7695492,30774372,123089892,492329316,
 1969287012,7877027532,31507989612,126031476876,
 504125425932,2016499779372,8065997193132,
 32263981077036,129055916612652,516223635676236]