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A046426
Numbers requiring 6 steps to reach a prime under the prime factor concatenation procedure.
0
45, 64, 153, 156, 169, 186, 190, 195, 258, 304, 325, 381, 396, 464, 493, 561, 575, 602, 646, 652, 662, 713, 725, 825, 843, 879, 880, 899, 944, 948, 951, 957, 988, 989, 1007, 1048, 1106, 1121, 1166, 1239, 1252, 1265, 1267, 1293, 1390, 1422, 1474, 1480, 1486
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A336553 A366460 A140278 * A056776 A172466 A038494
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Jun 15 1998
EXTENSIONS
Edited by Charles R Greathouse IV, Apr 28 2010
STATUS
approved