A032736 a(n) cannot be prefixed or followed by any digit to form a prime ('empty' prefixes allowed).

14612, 27971, 29289, 33170, 36186, 38327, 39608, 40078, 41165, 41528, 43277, 44657, 47382, 55553, 55791, 58899, 60806, 62318, 63056, 65970, 66818, 70558, 73851, 80477, 81167, 83986, 86145, 89072, 89280, 90379, 91538, 93160, 96222

Offset

1,1

Links

Table of n, a(n) for n=1..33.

Example

60806 prefixed with a digit from ('',1,2,3,4,5,6,7,8,9) and followed by a digit from (1,3,7,9) never yields a prime: '_'60806'3' = 43 x 79 x 179; '1'14612'3' = 3^3 x 11 x 17 x 227.

Crossrefs

Cf. A032682-A032685 and A032702-A032733.

Sequence in context: A175973 A265651 A153428 * A032738 A252218 A133858

Adjacent sequences: A032733 A032734 A032735 * A032737 A032738 A032739

Keyword

nonn,base

Author

Patrick De Geest, May 15 1998

Extensions

Offset changed by Andrew Howroyd, Aug 13 2024

Status

approved