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A076711 Highly composite triangular numbers. 2
1, 3, 6, 28, 36, 120, 300, 528, 630, 2016, 3240, 5460, 25200, 73920, 157080, 437580, 749700, 1385280, 1493856, 2031120, 2162160, 17907120, 76576500, 103672800, 236215980, 842161320, 3090906000, 4819214400, 7589181600, 7966312200 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

Shyam Sunder Gupta Fascinating Triangular Numbers

EXAMPLE

a(4)=28: 28 is a triangular number and has 6 divisors. Number of divisors of all triangular numbers less than 28 is less than 6. So 28 is a highly composite triangular number.

CROSSREFS

Cf. A101755, A101756.

Sequence in context: A074894 A083675 A085076 * A075088 A102428 A128056

Adjacent sequences:  A076708 A076709 A076710 * A076712 A076713 A076714

KEYWORD

nonn

AUTHOR

Shyam Sunder Gupta (guptass(AT)rediffmail.com), Oct 26 2002

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Last modified February 16 14:07 EST 2012. Contains 205930 sequences.