A116055 - OEIS

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A116055

Triangular numbers whose representation is made of nontrivial runs of identical digits.

0

55, 66, 666, 2211, 222111, 339900, 1188111, 22221111, 88000011, 111221155, 553330011, 2200066611, 2222211111, 2233558866, 55666666611, 77771144466, 222222111111, 880022001111, 888000000111, 1111226666655, 5533355001111

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OFFSET

1,1

COMMENTS

A run of length 1 is trivial.

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

T(14914) = 111221155.

CROSSREFS

Sequence in context: A269808 A004434 A168109 * A068898 A068899 A053719

Adjacent sequences: A116052 A116053 A116054 * A116056 A116057 A116058

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 13 2006

STATUS

approved