|
|
A343670
|
|
a(n) is the least semiprime congruent to 1 (mod n-th semiprime).
|
|
0
|
|
|
9, 25, 10, 21, 15, 46, 22, 111, 26, 183, 34, 35, 106, 39, 118, 93, 295, 205, 111, 58, 291, 187, 326, 346, 371, 155, 247, 86, 87, 262, 183, 94, 95, 381, 213, 334, 346, 119, 358, 122, 123, 247, 259, 134, 403, 142, 143, 287, 146, 731, 466, 159, 319, 323, 831, 339, 178, 535, 1099, 371, 562
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
EXAMPLE
|
9 = 4*2+1, 25 = 6*4+1, 10 = 9*1+1.
|
|
MATHEMATICA
|
sp = Select[Range[4, 10^3], 2 == PrimeOmega[#] &]; Table[n = sp[[k]]; a = n; While[2 != PrimeOmega[a + 1], a = a + n]; a + 1, {k, 100}]
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|