Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #17 Dec 17 2023 11:21:07
%S 1,50,576,242424,746074,10311073,54848721,103849853,48438192357
%N Self-locating strings within Pi: numbers n such that the reverse string n starts at position n in the decimal digits of Pi, where leading 3 is omitted.
%e 50 is a term because '05' starts at position 50,
%e 576 is a term because '675' starts at position 576:
%e Position 1 2 3 ... 50 51 ... 576 577 578 ...
%e Pi (3 omitted) 1 4 1 ... 0 5 ... 6 7 5 ...
%Y Cf. A057679, A057680, A366830.
%K nonn,base,more
%O 1,2
%A _J. Volkmar Schmidt_, Oct 31 2023