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

Author

Zak Seidov, Nov 16 2010

Keywords

• nonn

Comments

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

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

Crossrefs

Cf. A100208.

Programs

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