|
Search: id:A139327
|
|
|
| A139327 |
|
Write the first n^2 odd numbers consecutively in n rows of length n: a(n) = maximal number of primes in a row. |
|
+0
3
|
|
| 0, 2, 2, 3, 4, 4, 5, 5, 6, 7, 7, 8, 8, 8, 9, 10, 10, 10, 11, 11, 12, 13, 13, 14, 14, 14, 15, 15, 15, 16, 17, 17, 17, 18, 18, 19, 20, 20, 20, 21, 21, 22, 22, 22, 23, 23, 23, 23, 24, 24, 25, 26, 26, 27, 28, 28, 29, 29, 29, 29, 29, 29, 29, 30, 30, 31, 31, 31, 32, 33, 33, 33, 33, 33
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
a(n) = Max{A139325(n,k): 1<=k<=n}.
|
|
EXAMPLE
|
a(4)=Max{#{3,5,7},#{11,13},#{17,19,23},#{29,31}}=Max{3,2,3,2}=3:
..1 ...3 ...5 ...7 ... primes in 1st row = {3,5,7},
..9 ..11 ..13 ..15 ... primes in 2nd row = {11,13},
.17 ..19 ..21 ..23 ... primes in 3rd row = {17,19},
.25 ..27 ..29 ..31 ... primes in 4th row = {29,31}.
|
|
CROSSREFS
|
Cf. A139326.
Adjacent sequences: A139324 A139325 A139326 this_sequence A139328 A139329 A139330
Sequence in context: A057358 A038128 A097337 this_sequence A076905 A098295 A074840
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 14 2008
|
|
|
Search completed in 0.002 seconds
|
