A181730 Fixed points in A100208.

1, 2, 3, 5, 25, 33, 41, 60, 61, 64, 66, 72, 88, 129, 203, 212, 299, 313, 330, 380, 419, 442, 463, 480, 487, 517, 533, 560, 589, 603, 607, 633, 646, 649, 657, 658, 689, 703, 759, 776, 782, 791, 807, 814, 843, 853, 874, 907, 922, 953, 1034, 1075, 1127, 1140, 1143, 1149, 1156, 1232, 1237, 1243, 1270, 1288, 1339, 1341, 1395, 1409, 1518, 1525

Offset

1,2

Comments

Numbers n with property that A100208(n)=n.

There are 677 fixed points among first 20000 terms of A100208.

Links

Table of n, a(n) for n=1..68.

Prog

(PARI) print1(1, ", "); v=[1]; k=1; while(#v<=10^3, if(isprime(k^2+v[#v]^2)&&!vecsearch(vecsort(v), k), v=concat(v, k); if(k==#v, print1(k, ", ")); k=0); k++); \\ Derek Orr, Jun 08 2015

Crossrefs

Cf. A100208.

Sequence in context: A279864 A324289 A280258 * A024774 A068543 A064026

Adjacent sequences: A181727 A181728 A181729 * A181731 A181732 A181733

Keyword

nonn

Author

Zak Seidov, Nov 16 2010

Status

approved