|
| |
|
|
A181882
|
|
The sums of pairs of adjacent terms are the odd palindromic primes in ascending order.
|
|
0
|
|
|
|
2, 1, 4, 3, 8, 93, 38, 113, 68, 123, 190, 163, 210, 173, 554, 203, 584, 213, 706, 223, 10078, 423, 10178, 1133, 10278, 2143, 10578, 2243, 11088, 2743, 11188, 3153, 11588, 3863, 11688, 4373, 11988, 4573, 12088, 5383, 12588, 5593
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
This sequence was originally presented at http://www.sanaristikot.net by V.J. Pohjola, Nov 11 2010. [Added by V.J. Pohjola, Nov 25 2010.]
There are four possible solutions: see A181881-A181884.
|
|
|
REFERENCES
|
V. J. Pohjola, Posting to the Sequence Fans Mailing List, Nov 11 2010
|
|
|
LINKS
|
Table of n, a(n) for n=1..42.
Cf. A002385, A181881-A181884.
|
|
|
MATHEMATICA
|
lst = {}; a = 2; c = 0; Label[alku1]; b = c; Label[alku2]; b =b + 1; If[PrimeQ[a + b] && IntegerDigits[a + b] == Reverse[IntegerDigits[a + b]], AppendTo[lst, a], Goto[alku2]]; c = a; a = b; If[a < nn, Goto[alku1]]; lst (* V.J. Pohjola, Nov 25 2010 *)
|
|
|
CROSSREFS
|
Sequence in context: A028297 A207537 A114438 * A109195 A217927 A032662
Adjacent sequences: A181879 A181880 A181881 * A181883 A181884 A181885
|
|
|
KEYWORD
|
nonn,easy,base
|
|
|
AUTHOR
|
N. J. A. Sloane, Nov 18 2010
|
|
|
EXTENSIONS
|
More terms from Nathaniel Johnston, Nov 22 2010
|
|
|
STATUS
|
approved
|
| |
|
|
