-2378
domain: Z
Appears in sequences
- A measure of how close the square root of 2 is to rational numbers.at n=40A068515
- Expansion of 1/(1 + 2*x - x^2).at n=9A077985
- a(n) = -n^2 - n + 72.at n=49A110678
- Expansion of 2+(1-2*x)/(-1+2*x+x^2).at n=11A176981
- a(n) = -2*a(n-1) + a(n-2) for n > 2, with a(0) = a(1) = 1, a(2) = 0.at n=12A215936
- List of triples (r,s,t): the matrix M = [[1,4,4][1,3,2][1,2,1]] is raised to successive negative powers, then (r,s,t) are the square roots of M[3,1], M[1,1], M[1,3] respectively.at n=29A249577
- G.f.: Product_{m>0} 1/(1 + x^m + 2*x^(2*m) + 3*x^(3*m)).at n=24A290395