Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
integer sequence
|
| gptkbp:author |
gptkb:N._J._A._Sloane
|
| gptkbp:citation |
gptkb:A007770
gptkb:A000079 gptkb:A001047 |
| gptkbp:describes |
Number of n-bit numbers with all bits 1 (i.e., 2^n - 1)
|
| gptkbp:first_terms |
0, 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535, 131071, 262143, 524287, 1048575, 2097151, 4194303, 8388607, 16777215, 33554431, 67108863, 134217727, 268435455, 536870911, 1073741823, 2147483647
|
| gptkbp:form |
a(n) = 2^n - 1
|
| gptkbp:hasKeyword |
easy
nice nonn |
| https://www.w3.org/2000/01/rdf-schema#label |
A000225
|
| gptkbp:OEIS |
gptkb:A000225
https://oeis.org/A000225 |
| gptkbp:offset |
0,3
|
| gptkbp:sequence |
integer sequence
|
| gptkbp:bfsParent |
gptkb:Mersenne_number
|
| gptkbp:bfsLayer |
8
|