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A068621
a(1) = 7; a(n+1) = smallest triangular number > a(n) formed by adding at least one digit to a(n).
4
7, 78, 378, 1378, 91378, 7791378, 707914378, 3270729214378, 183270773294214378, 1783270773268946226147378
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..10.
CROSSREFS
Cf.
A068618
,
A068619
,
A068622
,
A068623
,
A068624
.
Sequence in context:
A107047
A210413
A045485
*
A210406
A133272
A186657
Adjacent sequences:
A068618
A068619
A068620
*
A068622
A068623
A068624
KEYWORD
base
,
nonn
AUTHOR
Amarnath Murthy
, Feb 25 2002
EXTENSIONS
a(5)-a(7) from
Ray G. Opao
, Dec 14 2004
a(8)-a(10) from
Max Alekseyev
, Apr 25 2009, Feb 11 2018
STATUS
approved
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Last modified April 18 04:56 EDT 2024. Contains 371767 sequences. (Running on oeis4.)