# A132335 (b-file synthesized from sequence entry) 0 1 1 3 2 6 3 19 4 51 5 129 6 361 7 939 8 2433 9 6376 10 16362 11 41970 12 107206 13 271881 14 687999 15 1733695 16 4352877 17 10899381 18 27208492 19 67745649 20 168275466 21 417023747 22 1031321451 23 2545496316 24 6271166097 25 15423190770 26 37869769518 27 92842013185