|
| |
|
|
A115024
|
|
Natural numbers n such that number of primes factors is equal to the number of decimal digits of n.
|
|
0
| |
|
|
2, 3, 5, 7, 10, 14, 15, 21, 22, 25, 26, 33, 34, 35, 38, 39, 46, 49, 51, 55, 57, 58, 62, 65, 69, 74, 77, 82, 85, 86, 87, 91, 93, 94, 95, 102, 105, 110, 114, 116, 117, 124, 125, 130, 138, 147, 148, 153, 154, 164, 165, 170, 171, 172, 174, 175, 182, 186, 188, 190, 195
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
MATHEMATICA
| Select[Range[2, 300], Sum[FactorInteger[ # ][[i]][[2]], {i, 1, Length[FactorInteger[ # ]]}] == Floor[Log[10, # ] + 1] &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 27 2006
|
|
|
CROSSREFS
| Sequence in context: A035954 A023192 A064480 * A167050 A019529 A194242
Adjacent sequences: A115021 A115022 A115023 * A115025 A115026 A115027
|
|
|
KEYWORD
| base,easy,nonn
|
|
|
AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Feb 24 2006
|
|
|
EXTENSIONS
| More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 27 2006
|
| |
|
|
