213003
domain: N
Appears in sequences
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite LTN = Linde Type N Na384[Al384Si384O1536].518H2O starting with a T4 atom.at n=7A019039
- a(n) = 6*a(n-1)-8*a(n-2)-3 for n > 10; a(0)=753, a(1)=5043, a(2)=25779, a(3)=213003, a(4)=1687623, a(5)=18171219, a(6)=73344977, a(7)=769993485, a(8)=4480470831, a(9)=17582325855, a(10)=69524390079.at n=3A177423
- Number of 0..n arrays of length 5 with each element unequal to at least one neighbor, starting with 0.at n=20A221464
- Odd numbers k such that k and k+2 both have at least two divisors with the same value of the Euler totient function (A000010).at n=7A373527