28642

Appears in sequences

• Sum of 4th powers of primes dividing n.at n=38A005065
• Sum of 4th powers of odd primes dividing n.at n=38A005068
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (F(2), F(3), ...), t = A014306.at n=39A024596
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (F(2), F(3), F(4), ...), t = A014306.at n=38A025110
• Expansion of g.f.: (1 + x)/(1 - 3*x - 2*x^2).at n=8A055099
• Sums of two or more distinct 4th powers of primes.at n=27A130833
• Sums of two distinct prime 4th powers.at n=11A130873
• Number of nX8 binary matrices with no 2X2 circuit having pattern 0101 in any orientation.at n=1A181243
• T(n,k) = Number of n X k binary matrices with no 2 X 2 circuit having pattern 0101 in any orientation.at n=37A181245
• T(n,k) = Number of n X k binary matrices with no 2 X 2 circuit having pattern 0101 in any orientation.at n=43A181245
• Quartan semiprimes: semiprimes of the form x^4 + y^4, x>0, y>0.at n=21A182277
• Expansion of 1/(1 - x - x^2 + x^18 - x^20).at n=22A185357
• T(n,k)=Number of 0..k arrays of length n+1 with 0 never adjacent to k.at n=42A212835
• Number of 0..n arrays of length 8 with 0 never adjacent to n.at n=2A212841
• Sum of numbers of bipartite partitions of (n,k) into distinct pairs for 0<=k<=n.at n=10A219557
• Number of 6 X n 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.at n=7A223842
• Number of arrays of the median of three adjacent elements of some length n+2 0..1 array.at n=16A228733
• Number of (n+2)X(1+2) 0..3 arrays with every consecutive three elements in every row and column having exactly 2 distinct values, in every diagonal 1 or 2 distinct values, in every antidiagonal 2 or 3 distinct values, and new values 0 upwards introduced in row major order.at n=3A252905
• Number of (n+2)X(4+2) 0..3 arrays with every consecutive three elements in every row and column having exactly 2 distinct values, in every diagonal 1 or 2 distinct values, in every antidiagonal 2 or 3 distinct values, and new values 0 upwards introduced in row major order.at n=0A252908
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every consecutive three elements in every row and column having exactly 2 distinct values, in every diagonal 1 or 2 distinct values, in every antidiagonal 2 or 3 distinct values, and new values 0 upwards introduced in row major order.at n=6A252910