

A068855


a(1) = 1; a(n) is the smallest triangular number > a(n1) which differs from it at every digit.


2



1, 3, 6, 10, 21, 36, 45, 66, 78, 91, 105, 210, 325, 406, 528, 630, 703, 820, 903, 1035, 2211, 3003, 4186, 5050, 6105, 7021, 8256, 9045, 10153, 21321, 30135, 41041, 50403, 61075, 70500, 82215, 90100, 101025, 210276, 303031, 411778, 500500, 611065
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OFFSET

1,2


LINKS

Table of n, a(n) for n=1..43.


EXAMPLE

325 belongs to this sequence and the next few triangular numbers are 351, 378, 406, 435; 406 is the smallest one which differs from 325 in all corresponding digit positions.


CROSSREFS

Cf. A000217, A068853, A068854, A068865.
Sequence in context: A068865 A060179 A056411 * A068882 A076713 A299017
Adjacent sequences: A068852 A068853 A068854 * A068856 A068857 A068858


KEYWORD

base,nonn


AUTHOR

Amarnath Murthy, Mar 12 2002


EXTENSIONS

Corrected and extended by Sascha Kurz, Feb 02 2003


STATUS

approved



