A027156 Self-convolution of array T given by A027144.
4, 20, 88, 416, 2464, 12320, 73344, 373248, 2286080, 11768320, 72968192, 378533888, 2368397312, 12353986560, 77788119040, 407431675904, 2577750163456, 13544806547456, 86015627231232, 453128543010816, 2886172831383552
Offset: 0