216224

Appears in sequences

• Values of n^2 - 1 resulting from A050795.at n=30A050799
• a(n) = (n-1)*(n+2)*(n^2 + n + 2)/4.at n=29A168566
• Numbers k such that tau(k+1) - tau(k) = 3, where tau(k) = the number of divisors of k (A000005).at n=27A230653
• Numbers k such that k and k+1 are both half-Zumkeller numbers (A246198).at n=23A331371
• Expansion of g.f. f/(1+2*f) where f is the g.f. of nonempty permutations.at n=9A355488
• Triangle read by rows. The partition transform of A355488, which are the alternating row sums of the number of permutations of [n] with k components (A059438).at n=46A357078