22104

Appears in sequences

• Gaps of 9 in sequence A038593 (lower terms).at n=19A038657
• Total number of nodes in all planted trees on n nodes.at n=11A095341
• Let M be the matrix defined in A111490. Sequence gives the sum of the elements of the submatrices (from the upper left element): M(1,1); M(1,1)+M(1,2)+M(1,2)+M(2,2); M(1,1)+M(1,2)+M(1,3)+M(2,1)+M(2,2)+M(2,3)+M(3,1)+M(3,2)+M(3,3), etc.at n=44A123326
• a(n) = C(2,n) DELTA C(0,n).at n=38A147721
• a(n) = 961*n + 1.at n=22A158414
• Numbers that are 4-digit palindromes in at least 2 bases.at n=27A180453
• Constant term in the reduction of the n-th Fibonacci polynomial by x^3->x^2+3x+1. See Comments.at n=13A192777
• Let G denote the 9-node, 16-edge graph formed from an octagon with main diagonals drawn and a node at the center; a(n) = number of magic labelings of G with magic sum 2n.at n=5A244867
• G.f. A(x) satisfies: A(x - 2*A(x^2)) = x + A(x^2).at n=6A295762
• a(n) = 27*n^2 - 21*n + 6 (n>=1).at n=28A304164
• The number of shaded cells in all compositions of n when light shines from the northwest. Here compositions are represented by stacked columns of adjacent cells.at n=12A372768