217770

Appears in sequences

• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,41.at n=12A064257
• a(n) = 3600*n^2 - 1601*n + 178.at n=7A157853
• Even octagonal pyramidal numbers (A002414).at n=29A218327
• a(n) is the surface area of the symmetric tower described in A221529 which is a polycube whose successive terraces are the symmetric representation of sigma A000203(i) (from i = 1 to n) starting from the top and the levels of these terraces are the partition numbers A000041(h-1) (from h = 1 to n) starting from the base.at n=33A345023