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A016942 as a simple table

na(n)
01024
11073741824
2289254654976
310240000000000
4141167095653376
51125899906842624
66278211847988224
727197360938418176
897656250000000000
9303305489096114176
10839299365868340224
112113922820157210624
124923990397355877376
1310737418240000000000
1422130157888803070976

[1024,1073741824,289254654976,10240000000000,
 141167095653376,1125899906842624,6278211847988224,
 27197360938418176,97656250000000000,
 303305489096114176,839299365868340224,
 2113922820157210624,4923990397355877376,
 10737418240000000000,22130157888803070976]