Countings: Sequences per type
Sequences (per base, k-value or individual number) with own page in this Wiki:
Sequence |
Type |
counting
|
Mersenne primes |
number |
51
|
Riesel primes k•2n-1 |
k-value |
3,841
|
Riesel primes k•bn-1, b>2 |
base |
12
|
Proth primes k•2n+1 |
k-value |
154
|
Proth primes k•bn+1, b>2 |
base |
9
|
Carol-Kynea primes (bn±1)2-2 |
base |
382
|
Williams primes (b-1)•bn-1 |
base |
169
|
Williams primes (b-1)•bn+1 |
base |
154
|
Williams primes (b+1)•bn-1 |
base |
87
|
Williams primes (b+1)•bn+1 |
base |
82
|
Leyland numbers xy+yx |
number |
1,814
|
Leyland numbers xy-yx |
number |
1
|
Woodall primes n•bn-1 |
base |
776
|
Near Woodall primes (n-1)•bn-1 |
base |
4
|
Near Woodall primes (n+1)•bn-1 |
base |
3
|
Cullen primes n•bn+1 |
base |
139
|
Near Cullen primes (n-1)•bn+1 |
base |
1
|
Near Cullen primes (n+1)•bn+1 |
base |
1
|
Fermat numbers F(2,n) |
number |
2
|
Gen.Fermat numbers F(3,n) |
number |
4
|
Gen.Fermat numbers F(4,n) |
number |
2
|
Gen.Fermat numbers F(5,n) |
number |
8
|
Gen.Fermat numbers F(6,n) |
number |
4
|
Gen.Fermat numbers F(7,n) |
number |
12
|
Gen.Fermat numbers F(8,n) |
number |
8
|
Gen.Fermat numbers F(9,n) |
number |
8
|
Gen.Fermat numbers F(10,n) |
number |
8
|
Gen.Fermat numbers F(11,n) |
number |
20
|
Gen.Fermat numbers F(12,n) |
number |
8
|