login
A076172
Triangular numbers with a triangular number of divisors which set a new record for number of divisors.
0
1, 28, 496, 2016, 41616, 270480, 7874496, 100472400, 3877678080, 103796842500, 171463387200, 1321327507500, 152393548836372480, 583286403740040000, 1900657247182848000, 9130869247932432000000
OFFSET
1,2
COMMENTS
No more terms < 8.7*10^14. - David Wasserman, Apr 25 2005
a(17) <= 2474502187869188605771776000. - Donovan Johnson, Feb 28 2012
EXAMPLE
d(41616) = 45, d(270480) = 120.
CROSSREFS
Sequence in context: A140107 A028170 A211677 * A004336 A079598 A212302
KEYWORD
more,nonn
AUTHOR
Jason Earls, Nov 01 2002
EXTENSIONS
More terms from David Wasserman, Apr 25 2005
a(13)-a(15) from Donovan Johnson, Apr 26 2011
a(16) from Donovan Johnson, Feb 28 2012
STATUS
approved