A157427 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A157427

Lower left-hand y-coordinates of invisible 1x1 squares with 0 < y < x.

14, 14, 20, 44, 39, 45, 21, 34, 50, 75, 21, 77, 44, 54, 39, 65, 90, 74, 45, 69, 34, 84, 56, 76, 50, 84, 111, 33, 119, 105, 69, 75, 95, 152, 14, 20, 55, 74, 110, 33, 153, 140, 14, 35, 56, 132, 174, 20, 35, 90

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..50.

Eric Weisstein's World of Mathematics, Visible Point

EXAMPLE

{20, 14}, {35, 14}, {35, 20}, {54, 44}, {65, 39}, {69, 45}, {77, 21}, {84, 34}, {84, 50}, {95, 75}, ...

CROSSREFS

Cf. A157426, A157428, A157429.

Cf. A325602, A325603, A325604, A325605, A325606, A325607.

Sequence in context: A186128 A105707 A325602 * A003905 A205702 A099203

Adjacent sequences: A157424 A157425 A157426 * A157428 A157429 A157430

KEYWORD

nonn

AUTHOR

Eric W. Weisstein, Mar 01 2009

STATUS

approved