# A053052 (b-file synthesized from sequence entry)
1 1
2 21
3 123
4 4321
5 12345
6 654321
7 1234567
8 87654321
9 123456789
10 10987654321
11 1234567891011
12 121110987654321
13 12345678910111213
14 1413121110987654321
15 123456789101112131415