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A343166
Sum of columns 1 and 2 of triangle in A343168.
0
1, 1, 2, 4, 9, 28, 86, 319, 1265
OFFSET
1,3
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Apr 19 2021, based on an email from Don Knuth
STATUS
approved