OFFSET
0,2
COMMENTS
x[y]z is the square bracket notation of hyper-operation, see A054871 for definitions and key links.
If there is only one digit a=b=0. If there are two then a=0.
REFERENCES
s
LINKS
Natan Arie' Consigli, Table of n, a(n) for n = 0..244
FORMULA
a(n) = (n mod 1000 - n mod 100 - n mod 10) [n mod 100 - n mod 10] n mod 10.
EXAMPLE
a(9) = 0[0]9 = 9+1 = 10;
a(31) = 0[3]1 = 0^1 = 0;
a(119) = 1[1]9 = 1+9 = 10;
a(162) = 1[7]2 = 1^^^^^2 = 1;
a(228) = 2[2]8 = 2*8 = 16;
a(239) = 2[3]9 = 2^9 = 512;
a(242) = 2[4]2 = 2^^2 = 4;
a(253) = 2[5]3 = 2^^^3 = 65536.
CROSSREFS
KEYWORD
nonn,fini,base
AUTHOR
Natan Arie Consigli, Nov 12 2016
STATUS
approved