A068143 Triangular numbers which are products of triangular numbers.

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

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