OFFSET
1,1
COMMENTS
Different from the largest absolute value of negative fundamental discriminant d for class number n (which is equal to A038552(n) for n <= 100) at indices 8, 48, 52, 64, 68, 96, ...
Conjecture: all terms are odd.
LINKS
Jianing Song, Table of n, a(n) for n = 1..100
EXAMPLE
Let h(D) denote the class number of the quadratic field with discriminant D.
n | Largest number k such | k' = largest number k | C(-k')
| that C(-k) = C_n | such that h(-k) = n |
----+-----------------------+-----------------------+----------
8 | 5947 | 6307 | C_2 X C_4
48 | 333547 | 335203 | C_2 X C_24
52 | 435163 | 439147 | C_2 X C_26
64 | 680947 | 693067 | C_2 X C_32
68 | 780187 | 819163 | C_2 X C_34
96 | 1681243 | 1684027 | C_2 X C_48
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Jianing Song, Oct 05 2022
STATUS
approved