A366831 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.

1, 50, 576, 242424, 746074, 10311073, 54848721, 103849853, 48438192357

Offset

1,2

Links

Table of n, a(n) for n=1..9.

Example

50 is a term because '05' starts at position 50,
576 is a term because '675' starts at position 576:
Position        1 2 3 ... 50 51 ... 576 577 578 ...
Pi (3 omitted)  1 4 1 ... 0  5  ... 6   7   5   ...

Crossrefs

Cf. A057679, A057680, A366830.

Sequence in context: A022147 A285044 A187669 * A160336 A231583 A156965

Adjacent sequences: A366828 A366829 A366830 * A366832 A366833 A366834

Keyword

nonn,base,more

Author

J. Volkmar Schmidt, Oct 31 2023

Status

approved