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A078364 as a simple table

na(n)
01
115
2224
33345
449951
5745920
611138849
7166336815
82483913376
937092363825
10553901543999
118271430796160
12123517560398401
131844491975179855
1427543862067299424
15411313439034311505

[1,15,224,3345,49951,745920,11138849,166336815,
 2483913376,37092363825,553901543999,8271430796160,
 123517560398401,1844491975179855,
 27543862067299424,411313439034311505]