Triangle read by rows: number of permutations of 1..n by length of longest run.
2, 2, 4, 2, 12, 10, 2, 16, 70, 32, 2, 20, 134, 442, 122, 2, 24, 198, 1164, 3108, 544, 2
2 seqfan posts
Fri May 11 21:25:25 CEST 2012 [seqfan] link from A010026 to corrected and extended A211318