|
Search: id:A086571
|
|
|
| A086571 |
|
a(1)=1, for n>1: a(n) = smallest divisor of n occurring earlier at most once. |
|
+0
10
|
|
| 1, 1, 3, 2, 5, 2, 7, 4, 3, 5, 11, 4, 13, 7, 15, 8, 17, 6, 19, 10, 21, 11, 23, 6, 25, 13, 9, 14, 29, 10, 31, 8, 33, 17, 35, 9, 37, 19, 39, 20, 41, 14, 43, 22, 15, 23, 47, 12, 49, 25, 51, 26, 53, 18, 55, 28, 57, 29, 59, 12, 61, 31, 21, 16, 65, 22, 67, 34, 69, 35, 71, 18, 73
(list; graph; listen)
|
|
|
OFFSET
|
1,3
|
|
|
COMMENT
|
a(A086939(n)) = a(A086938(n)) = n. - Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Jul 24 2003
|
|
EXAMPLE
|
a(p) = p for primes p>2;
divisor set of n=12: {1,2,3,4,6,12}, divisors occurring <12: 1=a(1)=a(2), 2=a(4)=a(6), 3=a(3)=a(9) and 4=a(8); as 4 occurs only once a(12)=4.
|
|
CROSSREFS
|
Cf. A086572.
Sequence in context: A069735 A046524 A105222 this_sequence A133945 A124219 A103833
Adjacent sequences: A086568 A086569 A086570 this_sequence A086572 A086573 A086574
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Jul 22 2003
|
|
|
Search completed in 0.002 seconds
|
