23031

Appears in sequences

• Discriminants of totally complex sextic fields (negated).at n=19A023687
• Numbers k such that k and k+1 are both of the form p*q^3 where p and q are distinct primes.at n=22A215173
• Number of set partitions of [n] having exactly six pairs (m,m+1) such that m+1 is in some block b and m is in block b+1.at n=3A270960
• Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=4A317605
• Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=4A317608
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=40A317611
• a(n) = exp(-n) * Sum_{k>=0} (k + 1)^n * n^k / k!.at n=5A334240
• Square array T(n,k), n>=0, k>=0, read by antidiagonals downwards, where column k is the expansion of e.g.f. exp(k*(exp(x) - 1) + x).at n=60A335975