Number of nX2 1..4 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 decreasing order.
A166838
Number of nX2 1..4 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 decreasing order.
Terms
- a(0) =0a(1) =4a(2) =49a(3) =218a(4) =662a(5) =1626a(6) =3479a(7) =6748a(8) =12156a(9) =20664a(10) =33517a(11) =52294a(12) =78962a(13) =115934a(14) =166131a(15) =233048a(16) =320824a(17) =434316a(18) =579177a(19) =761938a(20) =990094a(21) =1272194a(22) =1617935a(23) =2038260a(24) =2545460a(25) =3153280a(26) =3877029a(27) =4733694a(28) =5742058a(29) =6922822
External references
- oeis: A166838