27441

Appears in sequences

• Integers that do not appear in A103502.at n=12A103504
• Convolution triangle, read by rows, where diagonals are successive self-convolutions of A118351.at n=60A118354
• G.f. satisfies: A(x) = 1 + x*exp( Sum_{n>=1} A226908(n)*A(x^n)*x^n/n ), where A(x) = exp( Sum_{n>=1} A226908(n)*x^n/n ).at n=14A226907
• Number of n X 3 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, and top left element zero.at n=3A232950
• T(n,k)=Number of nXk 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, and top left element zero.at n=18A232955
• Number of 4Xn 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, and top left element zero.at n=2A232958
• a(n) = 4*n^3 + 5.at n=20A243762
• a(n) = Sum_{k=1..n} (-1)^(k+1) * floor(n/k)^4.at n=12A344722
• a(n) is the smallest positive integer which can be represented as the sum of n distinct nonzero square pyramidal numbers in exactly n ways, or -1 if no such integer exists.at n=19A360218