A114872 Even numbers not representable as (p-1)p^k (where p is a prime and k>=0) in ascending order.

14, 24, 26, 34, 38, 44, 48, 50, 56, 62, 68, 74, 76, 80, 84, 86, 90, 92, 94, 98, 104, 114, 116, 118, 120, 122, 124, 132, 134, 140, 142, 144, 146, 152, 154, 158, 160, 164, 168, 170, 174, 176, 182, 184, 186, 188, 194, 200, 202, 204, 206, 208, 212, 214, 216, 218

Offset

1,1

Links

Table of n, a(n) for n=1..56.

Example

It is easy to check there is no prime p with 14=(p-1)*p^k and k>=0.

Mathematica

s = Split@ Sort@ Flatten@ Table[(Prime[n] - 1)Prime[n]^k, {n, 60}, {k, 0, 7}]; Complement[ 2Range@116, Take[Union@ Flatten@ s, {2, 58}]] (* Robert G. Wilson v *)

Crossrefs

Cf. A114871.

Sequence in context: A015850 A020905 A048635 * A106699 A111455 A171124

Adjacent sequences: A114869 A114870 A114871 * A114873 A114874 A114875

Keyword

nonn

Author

Franz Vrabec, Jan 03 2006

Extensions

More terms from Robert G. Wilson v, Jan 05 2006

Status

approved