Recurrence sequence in decimal expansion of Pi.

[Hans Havermann]

zak seidov:

> 3141592653589793238462643383279502884197169399375105820974944592307816
> the string "13" is found at position 111, the string "111" is at
> position 154, the string "154" at position 3645, etc.,

The example of A097614 (and I believe similar "recurrence" sequences  
based on other constants) seem to index the constant-string's first  
term as 0 (not 1), hence 13 -> 110 -> 174 -> etc.

I'm not saying there isn't room for both interpretations, just that  
since we already have sequences based on the index-1-starts-after-the- 
decimal-point convention, why not build on that?