26599
domain: N
Appears in sequences
- Number of 4 up, 4 down, 4 up, ... permutations of length 4n+1.at n=3A005983
- Strong pseudoprimes to base 27.at n=26A020253
- Strong pseudoprimes to base 30.at n=17A020256
- Strong pseudoprimes to base 43.at n=17A020269
- a(n) = (2*n+1)*(12*n+1).at n=33A033576
- Number of lines through at least 2 points of a 9 X n grid of points.at n=38A160849
- Numbers k such that 2^(2k-1) == 2 (mod 2k) and such that 2^(k-1) != 1 (mod k).at n=39A176033
- Number of 4 up, 4 down permutations of [n].at n=13A229885
- Integers n such that p = 4n + 1, q = 4p + 3, r = 4q + 5, s = 4r + 7 and t = 4s + 9 are all prime.at n=4A243528
- Number of linear extensions of the one-level grid poset G[(3^n), (0^(n-1)), (0^(n-1))].at n=2A274646
- Odd composite integers m such that A087130(m) == 5 (mod m).at n=39A335671
- Odd composite integers m such that U(m)^2 == 1 (mod m) and V(m) == 5 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=5 and b=-1, respectively.at n=24A337628
- Odd composite integers m such that A052918(m-J(m,29)) == 0 (mod m) and gcd(m,29)=1, where J(m,29) is the Jacobi symbol.at n=33A340095