Syllable count of 1,2,3,4,10

I once made a poem with a syllable count of 1,2,3,4,10 syllables per line for a contest, but I can't remember how that kind of poem is called
so , if somebody knows..
ty

Thank you

Sounds like a disease.

"You have tetractys... it's a disease of the tetra and it spreads throughout your whole body...."

Hee Hee. Mr. Morbid, over here......