login

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”).

A180693 as a simple table

na(n)
11
22197
3371293
44826809
551185893014090757
662748517
77056410014866816666030739693
8815730721
991733330193268616658399616009
1010604499373
11112455406951957393129
1212646218552730347184269489080961456410641
1313
141461920290375446110677
1515502932802662396215269535105521

[1,2197,371293,4826809,51185893014090757,62748517,
 7056410014866816666030739693,815730721,
 91733330193268616658399616009,10604499373,
 112455406951957393129,
 12646218552730347184269489080961456410641,13,
 1461920290375446110677,
 15502932802662396215269535105521]