# A053928 (b-file synthesized from sequence entry) 1 3 2 5 3 15 4 23 5 77 6 173 7 235 8 315 9 1515 10 2435 11 7227 12 23515 13 54335 14 97773 15 243515 16 2435077 17 3090673 18 72497765 19 74533585 20 9639636523 21 979793819766485 22 77170285247817565 23 9794365502654705173 24 1598601020441309256565 25 30484348812550551609088485 26 76975943837016723668817565