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A069556
Primes in which the k-th digit (counting from the right) is either a nonzero multiple of k or a divisor of k; furthermore the digit 1 is allowed only when k has no other divisors < 10.
5
2, 3, 5, 7, 23, 29, 41, 43, 47, 61, 67, 83, 89, 347, 349, 367, 383, 389, 641, 643, 647, 661, 683, 929, 941, 947, 967, 983, 2341, 2347, 2381, 2383, 2389, 2621, 2647, 2663, 2683, 2687, 2689, 2927, 2963, 2969, 4327, 4349, 4363, 4621, 4643, 4649, 4663, 4943
OFFSET
1,1
EXAMPLE
The prime 52627 is a member because 7 is a multiple of 1, 2
is a multiple of 2, 6 is a multiple of 3, 2 is a divisor of 4 and 5 is a multiple of 5.
CROSSREFS
Cf. A008364.
Sequence in context: A156756 A225659 A068690 * A210110 A235144 A235126
KEYWORD
base,nonn,easy
AUTHOR
Amarnath Murthy, Mar 22 2002
EXTENSIONS
Edited by David Wasserman, Nov 03 2005
STATUS
approved