|
|
A273974
|
|
Number of primes <= n-th Catalan number.
|
|
1
|
|
|
0, 0, 1, 3, 6, 13, 32, 82, 226, 651, 1939, 5946, 18637, 59736, 194898, 645742, 2167325, 7359262, 25237989, 87325031, 304549332, 1069685013, 3781189896, 13443608964, 48049822995, 172568075048, 622514907195, 2254799747130
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,4
|
|
LINKS
|
|
|
FORMULA
|
|
|
MATHEMATICA
|
Table[PrimePi[CatalanNumber[n]], {n, 0, 27}]
|
|
PROG
|
(Magma) [#PrimesUpTo(Catalan(n)): n in [0..18]];
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|