|
Search: id:A145193
|
|
|
| A145193 |
|
Omega(6n-1) + Omega(6n+1) |
|
+0
2
|
|
| 2, 2, 2, 3, 2, 3, 2, 3, 3, 2, 3, 2, 3, 3, 3, 3, 2, 2, 3, 4, 4, 3, 2, 4, 2, 3, 3, 3, 4, 2, 4, 2, 2, 4, 3, 4, 3, 2, 3, 2, 5, 3, 3, 3, 2, 4, 2, 4, 3, 4, 3, 2, 3, 5, 3, 3, 5, 2, 3, 3
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
For n=1, Omega(6n-1) + Omega(6n+1) = Omega(5) + Omega(7) = 1+1 = 2, so a(1)=2.
|
|
MATHEMATICA
|
For[x=6, x<601, x+=6, S=0; T=0; For[k=1, k< Length[FactorInteger[x-1]]+1, k++, S+= FactorInteger[x-1][[k]][[2]]]; For[m=1, m<Length[FactorInteger[x+1]]+1, m++, T+= FactorInteger[x+1][[m]][[2]]]; Print[x/6, " ", S+T]]
|
|
CROSSREFS
|
Cf. A145194
Sequence in context: A089842 A071215 A164024 this_sequence A143117 A076221 A029235
Adjacent sequences: A145190 A145191 A145192 this_sequence A145194 A145195 A145196
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Arran Fernandez (arran(AT)borve.org), Oct 03 2008
|
|
|
Search completed in 0.002 seconds
|
