OFFSET
1,1
COMMENTS
2^(p-1)*(p+1) - 1 is the p-th term of the Cunningham chain p = n_1, n_2, ..., where n_{i+1} = 2*n_i+1 for i >= 1.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
M. Farrokhi D. G., Nov 09 2023
EXTENSIONS
a(12) from Michael S. Branicky, Nov 09 2023
STATUS
approved