Stronger triangle of numbers

There is Pascal triangle where the 2 numbers above are used to get the number below, then there is Delannoy triangle where the 3 numbers above are used to get the number below Based on that I thought of a stronger triangle where as many numbers above as possible are used to get the number below and I got this triangle preview.redd.it/cog23tiz6yzh1.png The rule is 1st number in a row is always 1, 2nd number comes from the 3 numbers above, 3rd number from the 10 numbers above, 4th number from 21 numbers above and so on till we reach the mid point of any row after which the numbers get repeated in reverse order to get this triangle I couldn't find this triangle anywhere but this still seems to be interesting