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A068143 Triangular numbers which are products of triangular numbers. 1
36, 45, 210, 300, 378, 630, 780, 990, 1485, 1540, 2850, 3240, 3570, 4095, 4851, 4950, 5460, 8778, 9180, 11781, 15400, 17955, 19110, 21528, 25200, 26565, 26796, 31878, 33930, 37128, 37950, 39060, 40755, 43956, 52650, 61425, 61776 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..37.

EXAMPLE

210 is a member as 210 = 21*10 both triangular numbers. 300 is also a member 300 = 3*10*10.

CROSSREFS

Sequence in context: A048034 A195528 A144291 * A264961 A188630 A167310

Adjacent sequences:  A068140 A068141 A068142 * A068144 A068145 A068146

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Feb 23 2002

EXTENSIONS

Corrected and extended by Jon E. Schoenfield, Jul 23 2006

STATUS

approved

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Last modified November 11 18:50 EST 2019. Contains 329031 sequences. (Running on oeis4.)