# A074470 (b-file synthesized from sequence entry) 1 2 2 7 3 16 4 31 5 60 6 113 7 205 8 371 9 663 10 1176 11 2069 12 3631 13 6341 14 11039 15 19159 16 33164 17 57287 18 98763 19 169967 20 292061 21 501165 22 858892 23 1470334 24 2514423 25 4295912 26 7333264 27 12508213 28 21319360 29 36312685 30 61811287 31 105152840 32 178787270 33 303829041 34 516074615 35 876190239