|
Search: id:A138832
|
|
|
| A138832 |
|
Concatenation of n-th Mersenne prime A000668(n) and n-th perfect number. |
|
+0
2
|
|
| 36, 728, 31496, 1278128, 819133550336, 1310718589869056, 524287137438691328, 21474836472305843008139952128, 23058430092136939512658455991569831744654692615953842176
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
a(3)=31496 because A000668(3)=31 and A000396(3)=496.
|
|
CROSSREFS
|
Cf. A000396, A000668, A138816, A138817, A138818, A138819, A138820, A138821, A138822, A138833.
Sequence in context: A157092 A004419 A054339 this_sequence A109405 A064541 A058001
Adjacent sequences: A138829 A138830 A138831 this_sequence A138833 A138834 A138835
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
Omar E. Pol (info(AT)polprimos.com), Apr 06 2008
|
|
|
Search completed in 0.002 seconds
|
