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A157427 Lower left-hand y-coordinates of invisible 1x1 squares with 0 < y < x. 8
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

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Last modified February 25 19:39 EST 2021. Contains 341618 sequences. (Running on oeis4.)