A001374Number of relational systems on n nodes. Also number of directed 3-multigraphs with loops on n nodes.
4, 136, 44224, 179228736, 9383939974144, 6558936236286040064, 62879572771326489528942592, 8439543710699844562674685252214784, 16110027001555070629022725866559372785352704, 442829046878106126159584032189649757399796014050181120
The first term appear at position 2.
14159265358979323846264338…
…9124608051243884390451244136549762780797715691435997…
| terms | string | first position | occurrences |
|---|---|---|---|
| 1 | 4 | 2 | 100,011,958 |
| 2 | 4136 | 2,310 | 100,653 |
| 3 | 413644224 | not within 1,000,000,000 | 0 |
Searched the first 1,000,000,000 digits. Strings longer than 12 digits are not indexed.