# A149026 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 9 4 39 5 137 6 623 7 2441 8 11359 9 47521 10 224359 11 977861 12 4663291 13 20889033 14 100338007 15 458283489 16 2213130847 17 10255221601 18 49728217447 19 232997035357 20 1133494314963 21 5357336598661 22 26131321902595 23 124372530000641 24 607970318813431 25 2910173855944909 26 14251859249211531 27 68541473702526857