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A069344
Number of n X n symmetric binary arrays with path of adjacent 1's from upper right corner to lower left corner.
19
1, 3, 19, 246, 6486, 346550, 37410572, 8142026722, 3567024626500, 3142034178023610
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..10.
CROSSREFS
Cf. n X m
A069325
-
A069342
, n X n non-symmetric
A069343
.
Sequence in context:
A118023
A054590
A261495
*
A305562
A356672
A316294
Adjacent sequences:
A069341
A069342
A069343
*
A069345
A069346
A069347
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Mar 16 2002
STATUS
approved
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Last modified June 8 16:46 EDT 2024. Contains 373224 sequences. (Running on oeis4.)
