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A273729
Number of n-ary heaps on n levels (i.e., of A023037(n) elements).
2
1, 1, 2, 7484400
OFFSET
0,3
COMMENTS
a(5), a(6), a(7) have 1774, 31436, 625065 decimal digits, respectively.
LINKS
Wikipedia, D-ary heap
FORMULA
a(n) = A273712(n,n).
CROSSREFS
Main diagonal of A273712.
Cf. A023037.
Sequence in context: A352126 A157991 A233555 * A324440 A121390 A170997
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 28 2016
STATUS
approved