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A057056
Let R(i,j) be the rectangle with antidiagonals 1; 2,3; 4,5,6; ...; each k is an R(i(k),j(k)) and A057056(n)=j(C(n,3)).
1
1, 3, 1, 2, 2, 11, 8, 1, 7, 12, 15, 15, 11, 2, 24, 5, 22, 37, 49, 1, 60, 57, 47, 29, 2, 46, 2, 36, 66, 91, 5, 12, 11, 1, 106, 80, 42, 132, 72, 149, 63, 123, 7, 46, 76, 96, 105, 102, 86, 56, 11, 173, 101, 11, 144, 21, 132, 234, 57, 131
OFFSET
3,2
CROSSREFS
Sequence in context: A286546 A201282 A234522 * A360595 A016469 A274342
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jul 30 2000
STATUS
approved