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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”).

A111994 as a simple table

na(n)
01
16
233
3176
4930
54908
625954
7137712
8733539
93922834
1021060099
11113481504
12613619332
133328768344
1418112655748
1598833261600
16540705999621
172965360687518
1816299708148901
1989784615643728
20495545294427558

[1,6,33,176,930,4908,25954,137712,733539,3922834,
 21060099,113481504,613619332,3328768344,
 18112655748,98833261600,540705999621,
 2965360687518,16299708148901,89784615643728,
 495545294427558]