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A005544 as a simple table

na(n)
22
318
4136
51030
67992
763796
8522474
94369840
1037179840
11320861342
122802304988
1324725041598
14220077128644
151973963065574

[2,18,136,1030,7992,63796,522474,4369840,37179840,
 320861342,2802304988,24725041598,220077128644,
 1973963065574]