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A061999 as a simple table

na(n)
00
11
22
36
464
58120
6131860608
734774439752390528
82418523320185277177863741363978240
911698510100560033501377640350194228137500049288930688305497138757632

[0,1,2,6,64,8120,131860608,34774439752390528,
 2418523320185277177863741363978240,
 11698510100560033501377640350194228137500049288930\
 688305497138757632]