|
Search: id:A046496
|
|
|
| A046496 |
|
Primes expressible as the sum of 4 consecutive palindromes. |
|
+0
1
|
|
| 827, 1231, 1553, 2039, 3169, 3251, 159683, 199687, 319699, 1999969987, 2000030009, 3200030021, 80000299997, 200000300009, 20000003000009, 1599999969999983, 15999999996999999983, 24000000003000000013
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
LINKS
|
P. De Geest, World!Of Numbers
|
|
FORMULA
|
Primes of either of two forms: 4*(a+1)*10^(2*k)+3*10^k+4*a-7 or 4*(a+1)*10^(2*k)-3*10^k+4*a-29, where 1<=a<=8 and k is positive integer. [From Max Alekseyev (maxale(AT)gmail.com), Apr 12 2009]
|
|
EXAMPLE
|
E.g. 319699 = 79797 + 79897 + 79997 + 80008.
|
|
CROSSREFS
|
Cf. A000040, A002113.
Sequence in context: A104375 A066946 A143799 this_sequence A102350 A108830 A134726
Adjacent sequences: A046493 A046494 A046495 this_sequence A046497 A046498 A046499
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
Patrick De Geest (pdg(AT)worldofnumbers.com), Sep 15 1998.
|
|
EXTENSIONS
|
Extended by Max Alekseyev (maxale(AT)gmail.com), Apr 12 2009
|
|
|
Search completed in 0.002 seconds
|
