a(n,m) tabl head (triangle) for A089275 n\m 0 1 2 3 4 5 6 1 1 0 0 0 0 0 0 2 1 18 0 0 0 0 0 3 1 118 600 0 0 0 0 4 1 412 11772 35280 0 0 0 5 1 1060 97308 1494576 3265920 0 0 6 1 2270 508708 23753736 249815520 439084800 0 7 1 4298 1989148 218417400 6710001408 54187574400 80951270400 a(n,m) tabl head (triangle) for A089276 n\m 0 1 2 3 4 5 6 1 1 0 0 0 0 0 0 2 1 8 0 0 0 0 0 3 1 48 180 0 0 0 0 4 1 160 3204 8064 0 0 0 5 1 400 24972 311328 604800 0 0 6 1 840 125468 4654656 42454080 68428800 0 7 1 1568 476728 40968960 1073980368 7803233280 10897286400 ###################################################################################