133225

Appears in sequences

• Bending a piece of wire of length n+1; walks of length n+1 on a tetrahedron; also non-branched catafusenes with n+2 condensed hexagons.at n=12A001998
• Crystal ball sequence for D_4 lattice.at n=13A007204
• a(n) = (10*n + 5)^2.at n=36A017330
• a(n) = (11*n + 2)^2.at n=33A017414
• a(n) = (12*n + 5)^2.at n=30A017582
• Squares resulting from procedure described in A048383.at n=14A048384
• a(n) = (3^n + 1)^2/4.at n=6A051500
• a(1) = 2; for n>1, a(n) is the smallest square > a(n-1) obtained by inserting digits into a(n-1).at n=5A068176
• Numbers k having exactly one divisor d such that in binary representation d and k/d have the same number of 1's as k.at n=18A080026
• Perfect powers using only prime digits and 1.at n=17A083806
• Structured rhombic triacontahedral numbers (vertex structure 7).at n=24A100165
• a(n) = (A046717(n))^2 (starting with n=1).at n=5A120096
• a(n) = (14*n+1)^2.at n=26A134934
• Number of n X 3 binary arrays with each 1 adjacent to exactly one 0 vertically and one 0 horizontally.at n=14A183345
• Number of disconnected regular simple graphs on n vertices with girth at least 5.at n=43A185215
• The numbers n^2 as n runs through the numbers which are palindromes in base 2.at n=37A192775
• Number of quadruples (w,x,y,z) with all terms in {0,...,n} such that w-x, x-y, and y-z all have the same parity.at n=26A212893
• Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.at n=11A221276
• Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have (a+b)^2 = k.at n=22A258844
• Squares whose largest digit is 5.at n=23A295015