a(n) is the starting position of the first occurrence of a string of at least n 3's in the decimal expansion of Pi.

A050282

a(n) is the starting position of the first occurrence of a string of at least n 3's in the decimal expansion of Pi.

Terms

    a(0) =9a(1) =24a(2) =1698a(3) =28467a(4) =28467a(5) =710100a(6) =710100a(7) =36488176a(8) =2011485307a(9) =4663739959a(10) =60422218263

External references