The first lower diagonal in square array A137570; equals the convolution of the main diagonal A137571 with the Catalan numbers (A000108) and with the square of A002293.
A137573
The first lower diagonal in square array A137570; equals the convolution of the main diagonal A137571 with the Catalan numbers (A000108) and with the square of A002293.
Terms
- a(0) =1a(1) =5a(2) =29a(3) =186a(4) =1281a(5) =9294a(6) =70109a(7) =544833a(8) =4333381a(9) =35108351a(10) =288738813a(11) =2404256945a(12) =20228988678a(13) =171716799066
External references
- oeis: A137573