OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..2500
FORMULA
MATHEMATICA
b[0] := 0; b[1] := 1;
b[n_?EvenQ] := b[n] = 9*b[n/2];
b[n_?OddQ] := b[n] = 10*b[(n - 1)/2] + b[(n - 3)/2];
Table[b[n], {n, 1, 70}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, Mar 15 2006
EXTENSIONS
New name using formula, Joerg Arndt, Dec 17 2022
STATUS
approved