OFFSET
1,1
LINKS
Donovan Johnson, Table of n, a(n) for n = 1..22
Eric Weisstein's World of Mathematics, Tetrahedral Numbers.
EXAMPLE
a(9) = 2875585020 = 2^2*3*5*7*11*17*19*41*47. 2875585020 is the smallest tetrahedral number with 9 distinct prime factors.
CROSSREFS
KEYWORD
nonn
AUTHOR
Donovan Johnson, Feb 08 2009
EXTENSIONS
Edited by Donovan Johnson, Nov 24 2010
a(18) added (from b-file) by Jon E. Schoenfield, Dec 17 2022
STATUS
approved