A087360 - OEIS

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A087360

Indices of triangular numbers in A087359.

1, 2, 3, 5, 6, 8, 12, 59, 72, 812, 1523, 47051, 234380, 82528328, 963837743, 8386720250208, 15040477267097648, 562429063569593838374096, 9285393339731985604589835104960, 631311818053863204637859662148296083530450400

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..20.

FORMULA

a(n) = floor(sqrt(2*A087359(n))). - David Wasserman, May 19 2005

CROSSREFS

Cf. A087359.

Sequence in context: A338916 A125559 A331865 * A111501 A094565 A364122

Adjacent sequences: A087357 A087358 A087359 * A087361 A087362 A087363

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Sep 08 2003

EXTENSIONS

More terms from David Wasserman, May 19 2005

STATUS

approved