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A297695 as a simple table

na(n)
14
28
326
460
5176
6436
71216
83120
98488
1022160
1159552
12156816
13418880
141107712
152950048
167817664
1720789248
1855148864
19146548736
20388957440
211033216640
222742970624
237285063168
2419342708992
2551367846912
26136396150784
27362207435264

[4,8,26,60,176,436,1216,3120,8488,22160,59552,
 156816,418880,1107712,2950048,7817664,20789248,
 55148864,146548736,388957440,1033216640,
 2742970624,7285063168,19342708992,51367846912,
 136396150784,362207435264]