A033705 Fancy primitive repdigit polygonal numbers (with multiplicity).

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

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 A295726

Adjacent sequences: A033702 A033703 A033704 * A033706 A033707 A033708

Keyword

nonn

Author

Mike Keith

Status

approved