Run lengths of the most significant decimal digit in the primes (A077648).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =2a(6) =2a(7) =3a(8) =2a(9) =2a(10) =3a(11) =2a(12) =1a(13) =21a(14) =16a(15) =16a(16) =17a(17) =14a(18) =16a(19) =14a(20) =15a(21) =14a(22) =135a(23) =127a(24) =120a(25) =119a(26) =114a(27) =117a(28) =107a(29) =110