390144

Appears in sequences

• Number of permutations p of {1,2,3,...,n} such that Sum_{k=1..n} abs(k-p(k)) = 2n.at n=11A072949
• Triangle read by rows: Number of n-step self-avoiding walks on f.c.c. lattice ending at point with x = k.at n=33A227511
• Number of partitions of n*(n-1)/2 into at most four parts.at n=27A274099
• Noninfinitary perfect numbers: numbers k whose sum of noninfinitary divisors equals k.at n=3A327633