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A033705 Fancy primitive repdigit polygonal numbers (with multiplicity). 3
6, 9, 22, 55, 66, 88, 111, 111, 222, 333, 444, 555, 666, 777, 888, 6666, 44444, 111111, 111111, 777777, 999999, 111111111, 777777777, 9999999999, 333333333333, 555555555555, 555555555555, 1111111111111, 1111111111111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..29.

M. Keith, On Repdigit Polygonal Numbers, J. Integer Sequences, Vol. 1, 1998, #6.

CROSSREFS

Cf. A033706, A033707.

Sequence in context: A043883 A112393 A006132 * A033704 A121592 A034718

Adjacent sequences:  A033702 A033703 A033704 * A033706 A033707 A033708

KEYWORD

nonn

AUTHOR

Mike Keith (domnei(AT)aol.com)

STATUS

approved

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Last modified April 24 11:17 EDT 2017. Contains 285343 sequences.