OFFSET
0,1
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
FORMULA
Define the sequence {b(n)} by the recurrence b(0) = 0 and b(1) = 3, b(n) = b(n-1) + 3 * (9 * b(n-1)^3 - 53) mod 10^n for n > 1, then a(n) = (b(n+1) - b(n))/10^n.
EXAMPLE
3^3 == 7 (mod 10).
73^3 == 17 (mod 10^2).
373^3 == 117 (mod 10^3).
8373^3 == 1117 (mod 10^4).
68373^3 == 11117 (mod 10^5).
768373^3 == 111117 (mod 10^6).
PROG
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Seiichi Manyama, Aug 09 2019
STATUS
approved