A115695 Powerful(1) numbers (A001694) whose digit reversal is a pentagonal number (A000326).

1, 100, 500, 529, 1000, 1089, 2116, 5000, 6241, 10000, 50000, 52900, 100000, 103041, 108900, 151875, 211600, 500000, 529000, 549152, 624100, 1000000, 1089000, 2116000, 5000000, 5290000, 6241000, 10000000

Offset

1,2

Links

Table of n, a(n) for n=1..28.

Index entries for sequences related to powerful numbers

Example

529=23^2 is powerful and 925 is the 25th pentagonal number.

Crossrefs

Cf. A000326, A001694, A115696.

Sequence in context: A017642 A093004 A003588 * A250700 A250846 A172518

Adjacent sequences: A115692 A115693 A115694 * A115696 A115697 A115698

Keyword

nonn,base

Author

Giovanni Resta, Jan 31 2006

Status

approved