A224536 Number of ways a digit can be appended or prepended to n and form a unique prime.

4, 8, 2, 8, 3, 2, 2, 8, 2, 6, 4, 5, 1, 6, 1, 2, 2, 4, 1, 8, 0, 4, 3, 5, 1, 2, 2, 6, 2, 4, 1, 7, 0, 5, 2, 2, 1, 5, 2, 6, 2, 5, 1, 6, 2, 1, 3, 5, 1, 5, 2, 3, 2, 4, 2, 1, 2, 8, 1, 5, 2, 6, 0, 6, 3, 2, 1, 6, 1, 4, 2, 4, 1, 6, 1, 2, 2, 6, 1, 4, 1, 4, 4, 6, 0, 3, 1

Offset

0,1

Comments

See A224953 for the main entry. The only difference is a(1) = 8, when two copies of 11 are produced.

Links

Table of n, a(n) for n=0..86.

Crossrefs

Sequence in context: A159194 A200382 A143530 * A090488 A020848 A133058

Adjacent sequences: A224533 A224534 A224535 * A224537 A224538 A224539

Keyword

nonn,base

Author

T. D. Noe, Apr 21 2013

Status

approved