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A033704
Fancy primitive repdigit polygonal numbers.
1
6, 9, 22, 55, 66, 88, 111, 222, 333, 444, 555, 666, 777, 888, 6666, 44444, 111111, 777777, 999999, 111111111, 777777777, 9999999999, 333333333333, 555555555555, 1111111111111, 888888888888888, 1111111111111111, 2222222222222222, 3333333333333333
OFFSET
1,1
LINKS
Robert G. Wilson v, Table of n, a(n) for n = 1..53 (from Keith's paper)
M. Keith, On Repdigit Polygonal Numbers, J. Integer Sequences, Vol. 1, 1998, #6.
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved