|
| |
|
|
A104176
|
|
a(n) = bitwise OR operation applied between every term of n-th row of Pascal's triangle, represented in decimal notation.
|
|
1
| |
|
|
1, 1, 3, 3, 7, 15, 31, 55, 127, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535, 126975, 262143, 524287, 1048575, 2097151, 4194303, 8388607, 16777215, 33554431, 67108863, 134217727, 268435455, 536870911, 1073741823, 2147483647
(list; table; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,3
|
|
|
LINKS
| Eric Weisstein's World of Mathematics, Pascal's Triangle
|
|
|
FORMULA
| Most but not all terms are of the form 2^n - 1 for some integer n. In the first 1600 terms we have: repeated numbers: 1, 3, 127 and 274877906943. Numbers not of form 2^n -1: 55, 126975.
|
|
|
EXAMPLE
| Row 0 = 1 = 1
Row 1 = 1 OR 1 = 1
Row 2 = 1 OR 2 OR 1 = 3
Row 3 = 1 OR 3 OR 3 OR 1 = 3
|
|
|
CROSSREFS
| Sequence in context: A056420 A030069 A004043 * A032294 A146034 A032029
Adjacent sequences: A104173 A104174 A104175 * A104177 A104178 A104179
|
|
|
KEYWORD
| nonn,tabl
|
|
|
AUTHOR
| Andrew G. West (WestA(AT)wlu.edu), Mar 28 2005
|
| |
|
|
