OFFSET
1,1
COMMENTS
The probability that this occurs in a random base-b number is 1/b, so the divergence of the harmonic series suggests this sequence is infinite. a(28) = 574364584668 is the largest term < 10^12.
If 1 is added to terms of A002486, many of the resulting numbers (roughly 60%) are terms of this sequence. - Mike Keith, Jul 28 2024
EXAMPLE
2 is a term since Pi in base 2 is 11.00... which has two equal digits 0,0.
114 is a term since Pi in base 114 is 3.(16)(16)... which has two equal "digits" 16 and 16.
CROSSREFS
KEYWORD
nonn
AUTHOR
Mike Keith, Jul 06 2024
STATUS
approved