OFFSET
1,1
COMMENTS
Sequence arising in Farideh Firoozbakht's solution to Prime Puzzle 251 - 23 is the only pointer prime (A089823) not containing the digit "1".
The monotonically increasing value of successive product of digits (A091629) strongly suggests that in successive n the digit 1 must be present.
LINKS
Carlos Rivera's Prime Puzzles and Problems Connection, Puzzle 251, Pointer primes
Index entries for linear recurrences with constant coefficients, signature (13,-32,20).
FORMULA
From Chai Wah Wu, Feb 12 2021: (Start)
a(n) = 13*a(n-1) - 32*a(n-2) + 20*a(n-3) for n > 3.
G.f.: x*(-120*x^2 + 142*x - 29)/((x - 1)*(2*x - 1)*(10*x - 1)). (End)
EXAMPLE
a(1) = 23 + 6 = 29.
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Enoch Haga, Jan 24 2004
EXTENSIONS
Edited and extended by Ray Chandler, Feb 07 2004
STATUS
approved