Floor(Pi^n-n^Pi).

Terms

a(0) =2a(1) =1a(2) =-1a(3) =19a(4) =149a(5) =683a(6) =2568a(7) =8801a(8) =28814a(9) =92262a(10) =292334a(11) =921812a(12) =2900518a(13) =9118183a(14) =28653193a(15) =90026155a(16) =282837225a(17) =888573621a(18) =2791553542a(19) =8769944569a(20) =27551617590a(21) =86555987697a(22) =271923687926a(23) =854273498233