23966

Appears in sequences

• Number of 1's in n-th term of A007651.at n=38A022466
• Number of partitions satisfying (cn(0,5) = 0 and cn(1,5) = cn(4,5)).at n=59A036818
• Number of binary strings of length n with equal numbers of 00000 and 00001 substrings.at n=15A164178
• Number of simple unlabeled graphs on n nodes with connected components that are trees or cycles.at n=15A215978
• G.f.: 1/(1 - x*(1-x^6)/(1 - x^2*(1-x^7)/(1 - x^3*(1-x^8)/(1 - x^4*(1-x^9)/(1 - x^5*(1-x^10)/(1 - ...)))))), a continued fraction.at n=21A227375
• Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape W; triangle T(n,k), n>=0, 0<=k<=max(0,floor((n-2)/2)*2) read by rows.at n=10A247710
• Number of tilings of a 5 X n rectangle using n pentominoes of any but the W shape.at n=6A247774
• Number of (n+3)X(1+3) 0..1 arrays with each row and column not divisible by 9, read as a binary number with top and left being the most significant bits.at n=0A263153
• T(n,k)=Number of (n+3)X(k+3) 0..1 arrays with each row and column not divisible by 9, read as a binary number with top and left being the most significant bits.at n=0A263156
• A000168(n+1) - A000139(n).at n=5A359126