A186022 Diagonal sums of number triangle A186020.
1, 1, 3, 6, 19, 62, 239, 1013, 4723, 23870, 129779, 753784, 4651285, 30349577, 208575027, 1504582526, 11358446495, 89501837358, 734420232291, 6262593615501, 55392254339667, 507335283474158, 4804245661175599, 46971060027956608, 473534995965134505, 4916730522706507665
Offset: 0