218451
domain: N
Appears in sequences
- a(n) is the sum of squares of the numbers in row n of array T given by A026148.at n=7A027335
- Generalized Jacobsthal numbers.at n=17A084640
- a(n) = 2*a(n-1) + a(n-2) - 2*a(n-3).at n=17A140359
- Number of binary strings of length n with no substrings equal to 0101, 0110, or 1010.at n=22A164509
- a(n) = (5*2^n - 2*(-1)^n - 9)/3.at n=16A173078
- Q-residue of the triangle A051162, where Q is the triangular array (t(i,j)) given by t(i,j)=1. (See Comments.)at n=8A193658
- a(n) = 10*(4^n - 1)/3 + 1.at n=8A321421
- a(n) = (5*2^n + 7*(-1)^n)/3.at n=17A344109