LINKS
Reinhard Zumkeller, <a href="/A057607/b057607_1.txt">Table of n, a(n) for n = 2..16397</a> [a(2) changed by Georg Fischer, Jul 11 2022]
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Revision History for A057607
(Bold, blue-underlined text is an addition; faded, red-underlined text is aShowing entries 1-10 | older changes
Triangle T(n,k) = number of binary n-tuples u having exactly k grandchildren, where a grandchild is a vector obtained by deleting any two coordinates of u (n >= 2, 0<=k<=2^(n-2)).
(history; published version)
(history; published version)
STATUS
editing
approved
LINKS
Reinhard Zumkeller, <a href="/A057607/b057607_1.txt">Table of n, a(n) for n = 2..16397</a> [a(2) changed by _Georg Fischer_, , Jul 11 2022]
STATUS
proposed
editing
STATUS
editing
proposed
LINKS
Reinhard Zumkeller, <a href="/A057607/b057607_1.txt">Rows Table of n, a(n) for n = 2..15 of triangle, flattened16397</a> [a(2) changed by _Georg Fischer_, Jul 11 2022]
STATUS
approved
editing
STATUS
reviewed
approved
STATUS
proposed
reviewed
STATUS
editing
proposed
EXAMPLE
Triangle begins:
4;
0,2,6;
0,2,4,6,4;
4; 0,2,6; 0,2,4,6,4; 0,2,4,8,4,8,4,2,0; ...
...
STATUS
proposed
editing
STATUS
editing
proposed