Weak Goodstein sequence beginning with 266.

Terms

a(0) =266a(1) =6590a(2) =65601a(3) =390750a(4) =1679831a(5) =5765085a(6) =16777579a(7) =43047173a(8) =100000551a(9) =214359541a(10) =429982475a(11) =815731628a(12) =1475790101a(13) =2562891818a(14) =4294968647a(15) =6975758960a(16) =11019962273a(17) =16983564926a(18) =25600002083a(19) =37822861652a(20) =54875876045a(21) =78310988018a(22) =110075317151a(23) =152587893847