Triangle read by rows: Number of set partitions of {1,2,..,n} such that |k| is a block and no block |m| with m < k exists, (1 <= n, 1 <= k <= n).
A182930
Triangle read by rows: Number of set partitions of {1,2,..,n} such that |k| is a block and no block |m| with m < k exists, (1 <= n, 1 <= k <= n).
Terms
- a(0) =1a(1) =1a(2) =0a(3) =2a(4) =1a(5) =1a(6) =5a(7) =3a(8) =2a(9) =1a(10) =15a(11) =10a(12) =7a(13) =5a(14) =4a(15) =52a(16) =37a(17) =27a(18) =20a(19) =15a(20) =11a(21) =203a(22) =151a(23) =114a(24) =87a(25) =67a(26) =52a(27) =41a(28) =877a(29) =674
External references
- oeis: A182930