1963830

Appears in sequences

• Numbers k whose decimal representation, read as a base-21 value and divided by k, yields an integer.at n=40A032573
• The number of weakly alternating bargraphs of semiperimeter n. A bargraph is said to be weakly alternating if its ascents and descents alternate. An ascent (descent) is a maximal sequence of consecutive U (D) steps.at n=19A275448