# A011919 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 0 4 2 5 13 6 40 7 93 8 186 9 336 10 560 11 880 12 1320 13 1906 14 2669 15 3640 16 4853 17 6346 18 8160 19 10336 20 12920 21 15960 22 19506 23 23613 24 28336 25 33733 26 39866 27 46800 28 54600 29 63336 30 73080 31 83906 32 95893 33 109120 34 123669 35 139626 36 157080 37 176120 38 196840 39 219336 40 243706 41 270053 42 298480