OFFSET
2,1
COMMENTS
No 0's or 1's are allowed in the sequence. "Prime digits" are 2 3 5 7 and "composite" are 4 6 8 9.
EXAMPLE
2 3 4 6 8 22 23 44 46 48 52 53 55 57 64 72 ...
^ ^ - - - ^^ ^^ -- -- -- ^^ ^^ ^^ ^^ -- ^^
.2....3.....4.......6.........8.......2..2
pri..comp..pri.....comp......pri....com..pri
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Eric Angelini, May 05 2005
STATUS
approved