22173

Appears in sequences

• An L-tile is a 2 X 2 square with the upper 1 X 1 subsquare removed; no rotations are allowed. a(n) = number of tilings of a 4 X n rectangle using tiles that are either 1 X 1 squares or L-tiles.at n=10A025234
• Numbers whose base-3 representation has exactly 10 runs.at n=10A043590
• Numbers n such that number of runs in the base 3 representation of n is congruent to 1 mod 9.at n=28A043807
• Numbers n such that number of runs in the base 3 representation of n is congruent to 0 mod 10.at n=10A043815
• T(n,n+2), array T given by A047010.at n=8A047017
• Expansion of Product_{k > 0} (1 + f(k)*x^k), where f(n) = A147952(n).at n=32A147953
• Number of crossings in a regular drawing of the complete bipartite graph K(n,n).at n=20A159065
• Base-4 Keith numbers.at n=13A188196
• a(n) = n + floor( n^2/2 + n^3/3 ).at n=40A236773
• Sum of the largest parts of the partitions of n into 8 squarefree parts.at n=47A326452