OFFSET
1,1
COMMENTS
One and only one digit can change between any two successive primes in a run.
Rearrangement is optionally permitted to arrive at next consecutive prime in run.
Leading zeros are not permitted; all numbers in the run must have the same number of digits.
EXAMPLE
311 is in the sequence because it begins a run of seven consecutive primes as required:
311 (1->3) 313 (3->7) 317 (7->3,swap 1&3) 331 (1->7) 337 (3->4) 347 (7->9) 349.
401 starts a run of nine: 401, 409, 419, 421, 431, 433, 439, 443, 449.
Note that 409 and 419 are not included since they are not the start of the run.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Ki Punches, Mar 04 2009, Mar 06 2009
EXTENSIONS
Edited by Ray Chandler, Mar 08 2009
STATUS
approved