108204

Appears in sequences

• Number of polyominoes with n cells that tile the plane isohedrally.at n=13A075205
• Number of length n binary words that contain at least one pair of consecutive 0's followed by (at some point in the word) at least one pair of consecutive 1's.at n=17A235996
• Square array A(1,k) = A265905(k), A(n>1,k) = A(n-1, k+1) - A(n-1, k); successive differences of A265905 read by descending antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), ...at n=30A275950
• Transpose of array A275950.at n=33A275951
• First differences of A265906; second differences of A265905.at n=5A275953
• Number of nonequivalent noncrossing cacti with n nodes up to rotation and reflection.at n=10A361243
• Numbers k such that k, k+1 and k+2 have exactly 4 distinct prime factors.at n=40A364309