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A068621
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a(1) = 7; a(n+1) = smallest triangular number > a(n) formed by adding at least one digit to a(n).
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4
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..10.
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CROSSREFS
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Cf. A068618, A068619, A068622, A068623, A068624.
Sequence in context: A107047 A210413 A045485 * A210406 A133272 A186657
Adjacent sequences: A068618 A068619 A068620 * A068622 A068623 A068624
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy, Feb 25 2002
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EXTENSIONS
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a(5)-a(7) from Ray G. Opao, Dec 14 2004
a(8)-a(10) from Max Alekseyev, Apr 25 2009, Feb 11 2018
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STATUS
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approved
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