|
Search: id:A002069
|
|
|
| A002069 |
|
Palindromic pentagonal numbers.
(Formerly M3924 N1612)
|
|
+0
3
|
|
| 0, 1, 5, 22, 1001, 2882, 15251, 720027, 7081807, 7451547, 26811862, 54177145, 1050660501, 1085885801, 1528888251, 2911771192, 2376574756732, 5792526252975, 5875432345785, 10810300301801, 264571020175462, 5292834004382925
(list; graph; listen)
|
|
|
OFFSET
|
1,3
|
|
|
REFERENCES
|
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
Problem E427, Amer. Math. Monthly, 48 (1941), 211-212.
|
|
LINKS
|
P. De Geest, See also
|
|
CROSSREFS
|
Cf. A028386, A000326.
Sequence in context: A115657 A066865 A005632 this_sequence A120488 A054415 A156328
Adjacent sequences: A002066 A002067 A002068 this_sequence A002070 A002071 A002072
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
Search completed in 0.002 seconds
|
