|
Search: id:A138124
|
|
|
| A138124 |
|
Initial digit of n-th even superperfect number A061652(n). |
|
+0
5
|
|
| 2, 4, 1, 6, 4, 6, 2, 1, 1, 3, 8, 8
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Also, initial digit of n-th superperfect number A019279(n), if there are no odd superperfect numbers.
|
|
EXAMPLE
|
a(5)=4 because the 5th even superperfect number A061652(5) is 4096 and the initial digit of 4096 is 4.
|
|
CROSSREFS
|
Cf. A000030, A077648, A019279, A061652, A135613, A135617, A138125.
Sequence in context: A081879 A066248 A065164 this_sequence A128860 A019680 A080032
Adjacent sequences: A138121 A138122 A138123 this_sequence A138125 A138126 A138127
|
|
KEYWORD
|
base,more,nonn
|
|
AUTHOR
|
Omar E. Pol (info(AT)polprimos.com), Apr 01 2008
|
|
|
Search completed in 0.002 seconds
|
