login

A172598 as a simple table

na(n)
10
20
31
42308743493056
5674741194624071430134879600
64286480050914725856131217361234536200970000
7422006703164863149555124419847097220761027785050113408280000

[0,0,1,2308743493056,674741194624071430134879600,
 4286480050914725856131217361234536200970000,
 42200670316486314955512441984709722076102778505011\
 3408280000]