A046502 Primes with multiplicative persistence value 2.

29, 37, 43, 53, 67, 73, 83, 127, 137, 163, 167, 173, 199, 223, 233, 251, 257, 269, 271, 281, 317, 349, 431, 439, 457, 461, 521, 523, 541, 547, 563, 569, 587, 599, 613, 617, 631, 641, 653, 659, 761, 821, 827, 853, 857, 859, 919, 991, 1129, 1153, 1163, 1217

Offset

1,1

Links

Daniel Mondot, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Multiplicative Persistence

Example

29 -> 2 * 9 -> [ 18 ] -> 1 * 8 -> [ 8 ] -> one digit in two steps.

Crossrefs

Intersection of A000040 and A046511.

Cf. A046500.

Sequence in context: A295490 A172195 A161724 * A255204 A049746 A097997

Adjacent sequences: A046499 A046500 A046501 * A046503 A046504 A046505

Keyword

nonn,base

Author

Patrick De Geest, Sep 15 1998

Status

approved