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A273732 Number of permutations of n elements divided by the number of quaternary heaps on n+1 elements. 2
1, 1, 1, 1, 1, 2, 3, 4, 5, 10, 15, 20, 25, 50, 75, 100, 125, 250, 375, 500, 625, 1500, 2625, 4000, 5625, 12500, 20625, 30000, 40625, 87500, 140625, 200000, 265625, 562500, 890625, 1250000, 1640625, 3937500, 6890625, 10500000, 14765625, 32812500, 54140625 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,6
LINKS
Wikipedia, D-ary heap
FORMULA
a(n) = A000142(n)/A178009(n+1).
CROSSREFS
Column k=4 of A273730.
Sequence in context: A064419 A032543 A140730 * A282032 A205962 A134220
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 28 2016
STATUS
approved

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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)