[seqfan] R: how is A177018 defined?

[vincenzo.librandi at tin.it]

Mathar voglio dire cioè che:
[A177018] 3, 3, 3, 4, 4, 5, 5, 6, 8, 8, 10, 11, 11, 12, 14, 16, 16, 18, 19, 19, 21, 22, 24, 27, 28, 28, 29, 29, 30, 36, 37, 39, 39, 43, 43, 45, 47, 48, 50, 52, 52, 56, 56, 57, 57, 62, 67, 68, 68, 69, 71, 71, 75, 77, 79, 81, 81, 83, 84, 84, 88, 94, 95, 95
[A067076] 0, 1, 2, 4, 5, 7, 8, 10, 13, 14, 17, 19, 20, 22, 25, 28, 29, 32, 34, 35, 38, 40, 43, 47, 49, 50, 52, 53, 55, 62, 64, 67, 68, 73, 74, 77, 80, 82, 85, 88, 89, 94, 95, 97, 98, 104, 110, 112, 113, 115, 118, 119, 124, 127, 130, 133, 134,137, 139, 140, 145, 152, 154, 155
[A001477] 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77
quindi: 3+0+0=33+1+1=53+2+2=74+4+3=114+5+4=13etc.
vedi tu, alcuni mesi fa ti avevo espresso e chiesto la stessa cosa. 
Thanksbest regardsVincenzo 



----Messaggio originale----
Da: mathar at strw.leidenuniv.nl
Data: 18-giu-2010 2.50 PM
A: <seqfan at seqfan.eu>
Cc: <vincenzo.librandi at tin.it>
Ogg: how is A177018 defined?


I have problems understanding the (apparently simple)
http://oeis.org/classic/A177018
"Numbers n such that n+A067076+A001477 is odd prime"
Why are values occurring more than once?
Which indices (or index combinations) are missing in the definition?

If we use "Numbers n such that n+A067076(n)+A001477(n) is prime",
which is of course the same as 
"Numbers n such that 2n+A067076(n) is prime"
we get the very different
1,2,6,9,12,23,28,29,32,36,39,43,49,52,59,64,69,73,87,99,..

Lead by the examples I considered "Smallest k such that
k+A067076(n+1)+A001477(n) is an odd prime"
but this doesn't match either.

RJM