Total sum of the sizes of all blocks with minimal element 3 in all set partitions of {1,2,...,n}.
A270766
Total sum of the sizes of all blocks with minimal element 3 in all set partitions of {1,2,...,n}.
Terms
- a(0) =2a(1) =9a(2) =41a(3) =195a(4) =979a(5) =5204a(6) =29278a(7) =174029a(8) =1090335a(9) =7182335a(10) =49620133a(11) =358677988a(12) =2706692878a(13) =21279580773a(14) =173959285361
External references
- oeis: A270766