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A080983 Smallest triangular number having n^2 as divisor. 2
1, 28, 36, 496, 300, 36, 1176, 8128, 3240, 300, 7260, 2016, 14196, 1176, 4950, 130816, 41616, 3240, 64980, 25200, 4851, 7260, 139656, 131328, 195000, 14196, 265356, 270480, 353220, 25200, 461280, 2096128, 29403, 41616, 1225, 738720, 936396 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n)=A000217(A080982(n)).

LINKS

Donovan Johnson, Table of n, a(n) for n = 1..5000

MATHEMATICA

With[{trnos=Accumulate[Range[2500]]}, Flatten[Table[Select[trnos, Divisible[ #, n^2]&, 1], {n, 40}]]] (* Harvey P. Dale, Jun 01 2014 *)

PROG

(Haskell)

a080983 = a000217 . a080982  -- Reinhard Zumkeller, Mar 23 2013

CROSSREFS

Cf. A066561.

Sequence in context: A105710 A192226 A323005 * A179105 A096430 A204822

Adjacent sequences:  A080980 A080981 A080982 * A080984 A080985 A080986

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Feb 26 2003

STATUS

approved

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Last modified May 24 04:25 EDT 2019. Contains 323528 sequences. (Running on oeis4.)