90177536
domain: N
Appears in sequences
- Expansion of g.f. (1+2*x)/(1-2*x)^2.at n=21A014480
- a(n) = 2^n*(binomial(n,2) + 1).at n=19A052481
- Noninvertible 3 X 3 matrices over Z_n.at n=7A065499
- a(n) = 2^(n-1)*A047240(n).at n=22A128205
- Denominators of a series expansion for Pi/2.at n=32A156269
- The "Row2" sums of the powers-of-2 triangle A000079.at n=6A181174
- Lexicographically earliest sequence such that (i) the binary plot of the sequence is symmetric with respect to the line y=x and (ii) the derived sequence (A000265(a(n))) contains only distinct terms.at n=22A240972