|
Search: id:A117171
|
|
|
| A117171 |
|
Column 1 of triangle A117170 of Inverse-Shift-Moebius coefficients, and so equals the Inverse-Shift-Moebius transform of [1,0,0,0,...]. |
|
+0
5
|
|
| 1, 1, 2, 2, 3, 3, 4, 3, 6, 5, 5, 6, 7, 7, 10, 7, 8, 10, 11, 11, 14, 11, 11, 14, 16, 14, 18, 17, 17, 21, 18, 17, 23, 22, 24, 25, 21, 24, 32, 28, 27, 33, 28, 32, 39, 30, 31, 36, 38, 41, 42, 41, 38, 50, 48, 44, 48, 45, 46, 59, 49, 53, 65, 55, 59, 63, 56, 65, 71, 70, 61, 72, 62, 72, 84
(list; graph; listen)
|
|
|
OFFSET
|
1,3
|
|
|
PROGRAM
|
(PARI) {a(n)=if(n<1, 0, prod(i=0, n, matrix(n, n, r, c, if(r>=c, if((r+i)%(c+i)==0, 1, 0))))[n, 1])}
|
|
CROSSREFS
|
Cf. A117170 (triangle), A117172 (column 2), A117173 (column 3), A117174 (row sums).
Sequence in context: A127431 A027833 A110676 this_sequence A084054 A106747 A083447
Adjacent sequences: A117168 A117169 A117170 this_sequence A117172 A117173 A117174
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Wouter Meeussen (wouter.meeussen(AT)pandora.be) and Paul D. Hanna (pauldhanna(AT)juno.com), Mar 05 2006
|
|
|
Search completed in 0.002 seconds
|
