Number of n X 3 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 n X 3 array.
A220148
Number of n X 3 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 n X 3 array.
Terms
- a(0) =6a(1) =23a(2) =77a(3) =242a(4) =727a(5) =2062a(6) =5493a(7) =13773a(8) =32664a(9) =73654a(10) =158660a(11) =327852a(12) =652215a(13) =1253089a(14) =2331716a(15) =4212805a(16) =7407330a(17) =12701233a(18) =21278447a(19) =34888718a(20) =56073127a(21) =88463032a(22) =137171407a(23) =209299293a(24) =314584340a(25) =466223256a(26) =681905438a(27) =985101192
External references
- oeis: A220148