Positions of the digit '7' in decimal expansion of Pi.

Terms

a(0) =13a(1) =29a(2) =39a(3) =47a(4) =56a(5) =66a(6) =96a(7) =99a(8) =120a(9) =139a(10) =156a(11) =166a(12) =209a(13) =224a(14) =232a(15) =235a(16) =242a(17) =288a(18) =299a(19) =301a(20) =306a(21) =320a(22) =343a(23) =351a(24) =405a(25) =407a(26) =412a(27) =429a(28) =439a(29) =452