Number of 2-packed matrices with exactly n nonzero entries.
A230880
Number of 2-packed matrices with exactly n nonzero entries.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =80a(4) =1120a(5) =20544a(6) =463744a(7) =12422656a(8) =384947200a(9) =13541822464a(10) =533049493504
External references
- oeis: A230880