OFFSET
2,1
COMMENTS
Also the decimal expansion of cotangent of 2 degrees. - Ivan Panchenko, Sep 01 2014
The least positive k such that floor(10^k tan 88°) is prime is k = 289 = 17^2. The sum of digits of the resulting prime is the prime 1279, whose sum of digits is the same as that of k, again a prime, 19. - M. F. Hasler, May 19 2023
LINKS
Ivan Panchenko, Table of n, a(n) for n = 2..1000
MATHEMATICA
RealDigits[Tan[88 Degree], 10, 120][[1]] (* Harvey P. Dale, Aug 29 2016 *)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
STATUS
approved