A235030 Numbers such that A235027(A235027(n)) <> n; Numbers which are divisible by any of the odd terms of A204219.

19, 38, 57, 59, 76, 79, 89, 95, 103, 109, 114, 118, 133, 137, 139, 149, 152, 157, 158, 171, 177, 178, 179, 190, 191, 206, 209, 211, 218, 228, 236, 237, 239, 241, 247, 266, 267, 271, 274, 278, 281, 285, 293, 295, 298, 304, 309, 311, 314, 316, 317, 323, 327, 342

Offset: 1

Author

Antti Karttunen, Jan 02 2014

Keywords

• nonn
• base

Comments

Sequence consists of all the primes in A204219 (after 2), together with all of their multiples.

Note that this is not the same as the numbers that do not occur in A235027 ("Garden of Eden" numbers for A235027), a subsequence of this sequence, which begins as: 19, 38, 57, 59, 76, 79, 89, 95, 103, 109, 114, 118, 133, 137, 139, 149, 152, 157, 158, 171, 177, 178, 179, 190, 191, 206, 211, 218, 228, 236, 237, 239, 241, 266, 267, 271, 274, 278, 281, 285, 293, 298, 304, 309, 311, 314, 316, 317, 327, 342, 347, 354, 356, 358, ...

The first term that occurs in this sequence, but not in the "GoE"-sequence is a(27)=209, as a(139) = 209 = 11*19 and 139 = A235146(2), the least integer which requires two steps to reach a fixed point or 2-cycle.

Both the above "GoE"-sequence, and its differences from this will be submitted later.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..10001

Crossrefs

Cf. A204219, A235027, A235145, A235146, A056539.