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A273723
Number of ternary heaps on n levels (i.e., of (3^n-1)/2 elements).
2
1, 1, 6, 7484400, 35417271278873496315860673177600000000
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OFFSET
0,3
LINKS
Alois P. Heinz,
Table of n, a(n) for n = 0..6
Wikipedia,
D-ary heap
FORMULA
a(n) =
A178008
(
A003462
(n)).
CROSSREFS
Column k=3 of
A273712
.
Cf.
A003462
,
A178008
.
Sequence in context:
A172876
A269516
A116272
*
A182792
A067484
A337083
Adjacent sequences:
A273720
A273721
A273722
*
A273724
A273725
A273726
KEYWORD
nonn
AUTHOR
Alois P. Heinz
, May 28 2016
STATUS
approved
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Last modified April 24 11:21 EDT 2024. Contains 371936 sequences. (Running on oeis4.)