A273725 - OEIS

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A273725

Number of quaternary heaps on n levels (i.e., of (4^n-1)/3 elements).

2

1, 1, 24, 3892643213082624

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..5

Wikipedia, D-ary heap

FORMULA

a(n) = A178009(A002450(n)).

CROSSREFS

Column k=4 of A273712.

Cf. A002450, A178009.

Sequence in context: A297424 A013910 A007458 * A072244 A067669 A068741

Adjacent sequences: A273722 A273723 A273724 * A273726 A273727 A273728

KEYWORD

nonn

AUTHOR

Alois P. Heinz, May 28 2016

STATUS

approved