login

A154021 as a simple table

na(n)
10
24
364
41020
516256
6259076
74128960
865804284
91048739584
1016714029060
11266375725376
124245297576956
1367658385505920
141078288870517764
1517184963542778304
16273881127813935100
174364913081480183296

[0,4,64,1020,16256,259076,4128960,65804284,
 1048739584,16714029060,266375725376,4245297576956,
 67658385505920,1078288870517764,17184963542778304,
 273881127813935100,4364913081480183296]