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A237949 as a simple table

na(n)
150268
2945688
317612024
4386513430
57955118248
6171966060604
73650074854108
880156219654316
91707964148016404
1036925068554778528
11793835282719330844
1217305654560457523958
13371564547082692396516
148024430424508906885568

[50268,945688,17612024,386513430,7955118248,
 171966060604,3650074854108,80156219654316,
 1707964148016404,36925068554778528,
 793835282719330844,17305654560457523958,
 371564547082692396516,8024430424508906885568]