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

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