# A094973 (b-file synthesized from sequence entry) 1 1 2 9 3 36 4 196 5 225 6 324 7 900 8 1225 9 4225 10 11025 11 41616 12 53361 13 88209 14 108900 15 176400 16 324900 17 374544 18 1413721 19 8643600 20 12723489 21 43956900 22 48024900 23 52490025 24 158407396 25 432224100 26 468506025 27 846984609 28 1631432881