Timeline for Cantor Pairing Function
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 16, 2016 at 7:00 | comment | added | kirma | I fear nothing in particular, but it is interesting to see that the sequence is defined in quite different terms in OEIS, and also a lone paper talking of "lexnumbers", whatever they are. | |
| Apr 16, 2016 at 7:00 | history | edited | bbgodfrey | CC BY-SA 3.0 |
added final comment
|
| Apr 16, 2016 at 6:58 | comment | added | bbgodfrey | @kirma Interesting. What do you make of it? Thanks. | |
| Apr 16, 2016 at 6:55 | comment | added | kirma |
Talking of values for which no solution exist... a curious sequence appears: Select[Range@100, Resolve[!Exists[{n, d}, n > 0 && d > 0, # == (n + d + 1) (n + d)/2 + d], Integers] &] (* {1, 2, 3, 5, 6, 9, 10, 14, 15, 20, 21, 27, 28, 35, 36, 44, 45, 54, 55, 65, 66, 77, 78, 90, 91} *). It would appear to be OEIS sequence A117142.
|
|
| Apr 16, 2016 at 6:28 | history | edited | bbgodfrey | CC BY-SA 3.0 |
added plot
|
| Apr 16, 2016 at 6:10 | history | answered | bbgodfrey | CC BY-SA 3.0 |