# A007097 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 5 4 11 5 31 6 127 7 709 8 5381 9 52711 10 648391 11 9737333 12 174440041 13 3657500101 14 88362852307 15 2428095424619 16 75063692618249 17 2586559730396077 18 98552043847093519 19 4123221751654370051 20 188272405179937051081 21 9332039515881088707361 22 499720579610303128776791 23 28785866289100396890228041