Thanks for 5.14.

works pretty good except that when I try to export in HTML an org file containing a table with a first horizontal line like the following

|--------+------------|

| 172141 |            |

|--------+------------|

|  16000 | 20582162-6 |

|  20000 |            |

|   7725 | 20582165-1 |

|   5000 | 20582166-9 |

|   1000 |            |

|--------+------------|

| 221866 |            |

#+TBLFM: @7$1=vsum(@1$1..@6$1)

I get

mapconcat: Args out of range: [2], 1

while if I delete the first line (the horizontal) I get HTML but the horizontal line inside the table does not get transformed to an html horizontal line.