57648

Appears in sequences

• Row sums of the number triangle A098505.at n=19A098506
• a(n) = 100*n^2 + 2*n.at n=23A158127
• a(n) = 25*n^2 + n.at n=47A173089
• The Wiener index of the zig-zag polyhex nanotube TUHC_6[2n,2] defined pictorially in Fig. 1 of the Eliasi et al. reference.at n=22A227703
• Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape T; triangle T(n,k), n>=0, 0<=k<=max(0,floor(2*(n-1)/3)), read by rows.at n=22A247707
• a(n) = (1/2)A291405(n).at n=14A291406
• Number of trees in all forests of (unlabeled) rooted identity trees with n vertices.at n=16A291532