A366393 a(n) is the largest number that can be obtained by deleting n digits from A007908(n).
9, 91, 912, 9213, 92314, 931415, 9341516, 94151617, 945161718, 9516171819, 95617181920, 961718192021, 9671819202122, 97181920212223, 978192021222324, 9819202122232425, 98920212223242526, 992021222324252627, 9922122232425262728, 99222223242526272829, 992222324252627282930
Offset: 10
References
- Titu Andreescu and Zuming Feng, A Path to Combinatorics for Undergraduates: Counting Strategies, Birkhäuser, Boston, 2004.
Formula
a(n) mod 10^A055642(n) = n, for n > 11.
Comments