# A351344 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 1 5 1 6 3 7 9 8 27 9 81 10 243 11 731 12 2223 13 6939 14 22727 15 79971 16 306929 17 1282815 18 5744361 19 26984415 20 130656409 21 644739377 22 3224303841 23 16318576681 24 83717193681 25 436948772697 26 2331807007139 27 12791837178265 28 72472130039123 29 425239734375217 30 2584950704996379