40756

Appears in sequences

• a(n) = n*(n+1)*(20*n-17)/6.at n=23A172117
• Numbers n such that 2^n + 41*2^floor((n+1)/2) - 1 is prime.at n=34A206554
• a(0)=a(1)=1, a(n) = least k > a(n-1) such that k*a(n-2) is an oblong number.at n=35A214963
• Positions of 2 in sequence A217916.at n=36A217918
• Number of partitions of n such that (number parts having multiplicity 1) is not a part and (number of 1s) is not a part.at n=49A241509
• Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.at n=3A252344
• Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.at n=3A252348
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.at n=24A252352
• Expansion of Product_{k>=0} ((1+x^(3*k+1))/(1-x^(3*k+1)))^2.at n=29A261649
• a(n) = n * (7*binomial(n, 2) + 1).at n=23A329530
• Number of minimal edge cuts in the n-antiprism graph.at n=19A378922