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A278196 as a simple table

na(n)
12436
25604
3451276
4715220
5831820
61300156
77089500
812132164
915796476
1026543660
11190569292
12483502844
13761002156
14851376628
151327710076
162841940500
173519222692
189035836076
1954770336324
201280011042268
211820701100652
223972999029388
236085253859260

[2436,5604,451276,715220,831820,1300156,7089500,
 12132164,15796476,26543660,190569292,483502844,
 761002156,851376628,1327710076,2841940500,
 3519222692,9035836076,54770336324,1280011042268,
 1820701100652,3972999029388,6085253859260]