Number of n X 3 1..2 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nonincreasing order.
A166830
Number of n X 3 1..2 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nonincreasing order.
Terms
- a(0) =2a(1) =8a(2) =18a(3) =33a(4) =54a(5) =82a(6) =118a(7) =163a(8) =218a(9) =284a(10) =362a(11) =453a(12) =558a(13) =678a(14) =814a(15) =967a(16) =1138a(17) =1328a(18) =1538a(19) =1769a(20) =2022a(21) =2298a(22) =2598a(23) =2923a(24) =3274a(25) =3652a(26) =4058a(27) =4493a(28) =4958a(29) =5454
External references
- oeis: A166830