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A090681 as a simple table

na(n)
01
11
231
35461
43202291
54722116521
614717667114151
786125672563201181
8868320396104950823611
914129659550745551130667441
10352552873457246307069012458671
1112942188000689093683411117827763301
12675618013651758631167025175564066787331
1348743995308245045290420262686473639399176761

[1,1,31,5461,3202291,4722116521,14717667114151,
 86125672563201181,868320396104950823611,
 14129659550745551130667441,
 352552873457246307069012458671,
 12942188000689093683411117827763301,
 675618013651758631167025175564066787331,
 48743995308245045290420262686473639399176761]