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Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A000359 as a simple table

na(n)
11
25
340
4440
56170
6105315
72120610
849242470
91296133195
1038152216495
111242274374380
1244345089721923
131722416374173854
1472330102999829054
153265871028909088036
16157797437377747327987
178124524883679977475839
18444098724261935142753430

[1,5,40,440,6170,105315,2120610,49242470,
 1296133195,38152216495,1242274374380,
 44345089721923,1722416374173854,72330102999829054,
 3265871028909088036,157797437377747327987,
 8124524883679977475839,444098724261935142753430]