80801
domain: N
Appears in sequences
- Numerators of continued fraction convergents to sqrt(101).at n=3A041180
- Numerators of continued fraction convergents to sqrt(404).at n=3A041766
- Numerators of continued fraction convergents to sqrt(909).at n=7A042756
- Weight distribution of [98,49,16] binary extended quadratic-residue (or QR) code.at n=9A145683
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (1, 0, 0), (1, 1, -1)}.at n=12A148130
- a(n) = 1250*n^2 + 100*n + 1.at n=7A154375
- a(n) = 128*n^2 + 32*n + 1.at n=24A157337
- 128n^2 + 2336n + 10657.at n=15A157433
- a(n) = 5000*n^2 + 200*n + 1.at n=3A157511
- a(n) = 80000*n^2 + 800*n + 1.at n=0A157664
- Nonnegative solutions of the Pell equation x^2 - 101*y^2 = +1. Solutions x = a(n).at n=2A227152
- The number of permutations of length n sortable by 2 prefix block transpositions.at n=24A228394