A046428 Numbers requiring 8 steps to reach a prime under the prime factor concatenation procedure.

78, 170, 315, 316, 544, 553, 579, 594, 626, 675, 726, 909, 940, 1056, 1088, 1090, 1107, 1118, 1178, 1210, 1260, 1349, 1382, 1482, 1580, 1585, 1616, 1617, 1620, 1645, 1647, 1746, 1824, 1872, 2033, 2145, 2188, 2195, 2201, 2211, 2225, 2250, 2338, 2349, 2365, 2378

Offset

1,1

Links

Rémy Sigrist, Table of n, a(n) for n = 1..1000

P. De Geest, Home Primes

Rémy Sigrist, PARI program for A046428

Prog

(PARI) \\ See Links section.

Crossrefs

Cf. A037271, A046411.

Sequence in context: A042945 A044329 A044710 * A119146 A044410 A044791

Adjacent sequences: A046425 A046426 A046427 * A046429 A046430 A046431

Keyword

nonn,base

Author

Patrick De Geest, Jun 15 1998

Extensions

More terms from Rémy Sigrist, May 19 2019

Status

approved