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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 55 |
| 4 | 10147 |
| 5 | 22069251 |
| 6 | 602351808741 |
| 7 | 215717608046511873 |
| 8 | 1046591482728407939338275 |
| 9 | 70417932475495769964322670258947 |
| 10 | 66880713903767740581650957184096513655153 |
| 11 | 909176713758393122455793478657031533216492953328933 |
| 12 | 178876969166665269546249744608783223036842010760723370462856181 |
| 13 | 514016665650183402309555825250370336139392333285719205357202846243695510965 |
[1,1,3,55,10147,22069251,602351808741, 215717608046511873,1046591482728407939338275, 70417932475495769964322670258947, 66880713903767740581650957184096513655153, 90917671375839312245579347865703153321649295332893\ 3, 17887696916666526954624974460878322303684201076072\ 3370462856181, 51401666565018340230955582525037033613939233328571\ 9205357202846243695510965] |