28626

Appears in sequences

• Cupolar numbers: a(n) = (n+1)*(5*n^2 + 7*n + 3)/3.at n=25A096000
• Indices of primes in sequence defined by A(0) = 43, A(n) = 10*A(n-1) + 33 for n > 0.at n=28A101730
• Number of (n+2)X(1+2) 0..1 arrays with each row and column not divisible by 7, read as a binary number with top and left being the most significant bits.at n=3A263113
• Number of (n+2)X(4+2) 0..1 arrays with each row and column not divisible by 7, read as a binary number with top and left being the most significant bits.at n=0A263116
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each row and column not divisible by 7, read as a binary number with top and left being the most significant bits.at n=6A263117
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each row and column not divisible by 7, read as a binary number with top and left being the most significant bits.at n=9A263117
• a(n) is the number of permutations of length n that avoid the pattern 321 and the mesh pattern (12, 179) or the same sequence for the mesh patterns (12, 185), (12, 314), (12, 410).at n=11A289590
• a(n) is the least k for which A340594(k) = n.at n=16A340595
• Number of unlabeled P-series with n elements.at n=12A349276
• a(n) = Sum_{k=0..floor(n/3)} (k+1) * binomial(k,n-3*k)^2.at n=27A375470