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A068622
a(1) = 5; a(n+1) = smallest triangular number > a(n) formed by adding at least one digit to a(n).
4
5, 15, 105, 1035, 103285, 10832185, 1083241785, 1087326541785, 108703236544918785, 108870232356544491187785
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OFFSET
1,1
COMMENTS
From a(3) onwards the sequence is
A068618
.
LINKS
Table of n, a(n) for n=1..10.
CROSSREFS
Cf.
A068618
,
A068619
,
A068621
,
A068623
,
A068624
.
Sequence in context:
A358197
A121869
A118412
*
A080449
A077702
A088418
Adjacent sequences:
A068619
A068620
A068621
*
A068623
A068624
A068625
KEYWORD
base
,
hard
,
more
,
nonn
AUTHOR
Amarnath Murthy
, Feb 25 2002
EXTENSIONS
a(6)-a(9) from
Max Alekseyev
, Apr 21 2009
a(10) from
Max Alekseyev
, Jan 01 2014
STATUS
approved
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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)