# A011808 (b-file synthesized from sequence entry) 1 2 2 13 3 299 4 19318 5 3167606 6 1216716022 7 1016289045634 8 1729283934497328 9 5667546539054689443 10 34105149235238728913664 11 361714725652426571177689094 12 6527156272709807559816283769206