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 a(n) = j(C(n,3)).

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

Links

Johann Peters, Table of n, a(n) for n = 3..20000

Example

C(7,3) = 35 and 35 = R(7,2) so j(35) = 2 and thus a(7) = 2. - Johann Peters, Apr 25 2026

Crossrefs

Sequence in context: A286546 A201282 A234522 * A360595 A016469 A274342

Adjacent sequences: A057053 A057054 A057055 * A057057 A057058 A057059

Keyword

nonn

Author

Clark Kimberling, Jul 30 2000

Status

approved