60720

Appears in sequences

• a(n) = floor(n*(n-1)*(n-2)*(n-3)/5).at n=25A011915
• A convolution triangle of numbers generalizing Pascal's triangle A007318.at n=50A049325
• Phi(A033631(n)) {phi is the Euler totient function A000010}.at n=24A115620
• Row 2 of rectangular table A124460.at n=9A124462
• Number of base 20 circular n-digit numbers with adjacent digits differing by 4 or less.at n=5A125357
• Numbers with prime factorization p*q*r*s*t^4 (where p, q, r, s, t are distinct primes).at n=13A190110
• Number of nX2 0..3 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors.at n=6A231581
• T(n,k)=Number of nXk 0..3 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors.at n=29A231586
• T(n,k)=Number of nXk 0..3 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors.at n=34A231586
• Indices k such that s_k(4) is a (probable) prime, where s_k(4) = 4*s_{k-1}(4) - s_{k-2}(4), k >= 2, s_0(4) = 1, s_1(4) = 5.at n=21A299100
• Number of integer partitions of n with biquanimous multiplicities.at n=49A371839