20621
domain: N
Appears in sequences
- Increasing gaps in A038593 (lower terms).at n=13A093342
- Duplicate of A093342.at n=13A093389
- (1/8)*number of lattice points with odd indices in a cubic lattice inside a sphere around the origin with radius 2*n.at n=33A120884
- Positions of 11's in A131744.at n=10A133152
- a(n) = 25*n^2 - 14*n + 2.at n=29A154357
- First member of a pair of numbers occurring in the definition of 2-happy couples.at n=49A191862
- Number of tilings of a 12 X n rectangle using 2n hexominoes of shape I.at n=20A250663
- Column 6 of A060244.at n=23A291596
- p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = 1 - S^2 - S^3.at n=21A292321
- x-value of the smallest solution to 2*x^2 - p*y^2 = (-1)^((p+1)/4), p = A002145(n).at n=12A306618