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A115691 Powerful(1) numbers (A001694) whose digit reversal is a triangular number. 2
1, 100, 1000, 5400, 10000, 54000, 100000, 540000, 1000000, 1306449, 1728243, 5400000, 10000000, 50086125, 54000000, 100000000, 130644900, 172824300, 540000000, 1000000000, 1044000721, 1306449000, 1728243000, 5008612500 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..24.

Index entries for sequences related to powerful numbers

EXAMPLE

5400=2^3*3^3*5^2 is powerful and 45=T(9).

CROSSREFS

Cf. A001694, A115692.

Sequence in context: A326638 A284515 A068086 * A066432 A173485 A173484

Adjacent sequences:  A115688 A115689 A115690 * A115692 A115693 A115694

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 31 2006

EXTENSIONS

a(14)-a(24) from Donovan Johnson, Oct 01 2009

STATUS

approved

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Last modified February 27 22:50 EST 2020. Contains 332319 sequences. (Running on oeis4.)