45595

Appears in sequences

• a(n) is the number of unlabeled graphs on n nodes whose components are unicyclic graphs.at n=14A137917
• Wiener index of a benzenoid consisting of a double-step spiral chain of n hexagons (n>=2, s=21; see the Gutman et al. reference).at n=19A193397
• Number of nonnegative integer arrays of length 2n+5 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value n+1.at n=24A211850
• Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its north, west, northwest or northeast neighbor modulo 3 and the upper left element equal to 0.at n=15A266494