18284

Appears in sequences

• a(n) = Fibonacci(2*n+1) + 2*Fibonacci(2*n-1) - 2^n - [n = 0], where [b] is the Iverson bracket of b.at n=10A084086
• Number of 2 X 2 matrices with all terms in {0,1,...,n} and (sum of terms) = n + 5.at n=41A210377
• Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|=|x-y|+|y-z|.at n=28A212570
• Number of (n+2)X(1+2) 0..1 arrays with the (lower) median of each row and column nondecreasing.at n=3A237734
• Number of (n+2)X(4+2) 0..1 arrays with the (lower) median of each row and column nondecreasing.at n=0A237737
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with the (lower) median of each row and column nondecreasing.at n=6A237738
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with the (lower) median of each row and column nondecreasing.at n=9A237738
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 606", based on the 5-celled von Neumann neighborhood.at n=35A273206
• a(n) is the number of integer partitions of n for which the smallest part is equal to the index of the seaweed algebra formed by the integer partition paired with its weight.at n=53A318196
• a(n) = Sum_{i+j+k+m=n, i,j,k,m >= 1} tau(i) * tau(j) * tau(k) * tau(m).at n=17A375002