Concatenation of sequence (1,3,..,2n-1,2n,2n-2,..,2).
A007943
Concatenation of sequence (1,3,..,2n-1,2n,2n-2,..,2).
Terms
- a(0) =12a(1) =1342a(2) =135642a(3) =13578642a(4) =13579108642
External references
- oeis: A007943
A007943
Concatenation of sequence (1,3,..,2n-1,2n,2n-2,..,2).