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A057039 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 A057039(n)=j(2n). 2
2, 3, 1, 3, 1, 4, 2, 6, 4, 2, 7, 5, 3, 1, 7, 5, 3, 1, 8, 6, 4, 2, 10, 8, 6, 4, 2, 11, 9, 7, 5, 3, 1, 11, 9, 7, 5, 3, 1, 12, 10, 8, 6, 4, 2, 14, 12, 10, 8, 6, 4, 2, 15, 13, 11, 9, 7, 5, 3, 1, 15, 13, 11, 9, 7, 5, 3, 1, 16, 14, 12, 10, 8, 6, 4, 2, 18, 16, 14 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

i(2n)=A057038(n).

LINKS

Table of n, a(n) for n=1..79.

CROSSREFS

Sequence in context: A220906 A023678 A128222 * A260449 A135511 A007413

Adjacent sequences:  A057036 A057037 A057038 * A057040 A057041 A057042

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jul 30 2000

STATUS

approved

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Last modified February 19 22:38 EST 2019. Contains 320328 sequences. (Running on oeis4.)