OFFSET
1,1
EXAMPLE
a(1) = 417979 because p(417979) = 6080051 and we have 3 x 3 square with desired property:
................
..7..11..13=>31.
.17..19..23=>59.
.29..31..37=>97.
..v..v...v.
.53..61..73.
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Feb 28 2006
STATUS
approved