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A057055
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 A057055(n)=i(C(n,3)).
1
1, 1, 4, 5, 7, 1, 6, 15, 12, 10, 10, 13, 20, 32, 14, 36, 23, 12, 4, 55, 1, 8, 22, 44, 75, 36, 84, 55, 30, 10, 100, 98, 104, 119, 20, 51, 94, 10, 75, 4, 95, 41, 162, 129, 105, 91, 88, 97, 119, 155, 206, 51, 129, 225, 99, 228, 124, 29
OFFSET
3,3
CROSSREFS
Sequence in context: A319260 A237196 A322711 * A177883 A245422 A272005
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jul 30 2000
STATUS
approved