Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 3Xn array.
A220155
Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 3Xn array.
Terms
- a(0) =10a(1) =26a(2) =77a(3) =254a(4) =645a(5) =1413a(6) =2841a(7) =5412a(8) =9905a(9) =17565a(10) =30369a(11) =51437a(12) =85641a(13) =140477a(14) =227277a(15) =362851a(16) =571663a(17) =888660a(18) =1362889a(19) =2062054a(20) =3078183a(21) =4534594a(22) =6594369a(23) =9470566a(24) =13438421a(25) =18849815a(26) =26150305a(27) =35899043a(28) =48791933a(29) =65688403
External references
- oeis: A220155