# A017550 (b-file synthesized from sequence entry) 0 64 1 7529536 2 308915776 3 3010936384 4 15625000000 5 56800235584 6 164206490176 7 404567235136 8 885842380864 9 1771561000000 10 3297303959104 11 5789336458816 12 9685390482496 13 15557597153344 14 24137569000000