297024

Appears in sequences

• Related to quartic factorial numbers A007696.at n=5A034255
• A convolution triangle of numbers obtained from A034255.at n=15A048882
• a(n) = binomial(n+3,3)*binomial(n+7,3).at n=11A104474
• Number of permutations of floor(i*6/5), i=0..n-1, with all sums of 6 adjacent terms unique.at n=8A152375
• Square rings obtained by adding four identical cuboids from A169938, a(n) = 4*n*(n+1)*(n*(n+1)+1).at n=16A288486
• Larger of semi-unitary amicable numbers pair: numbers (m, n) such that susigma(m) = susigma(n) = m + n, where susigma(n) is the sum of the semi-unitary divisors of n (A322485).at n=23A322542