This Excel lambda function produces an increasing sequence of non-consecutive integers

excel-lambda-RANDSEQUENCE.txt

/*
RANDSEQUENCE

Inputs:
  - numbers: the length of the sequence to be produced
  - max_between: the maximum difference between consecutive integers
  
Note: the minimum difference between one row and the next is assumed to be 1.
*/

RANDSEQUENCE =LAMBDA(numbers,max_between,
  LET(
    seq,SEQUENCE(numbers),
    SCAN(
      RANDBETWEEN(0,max_between),
      seq,
      LAMBDA(a,b,
        a+RANDBETWEEN(1,max_between)
      )
    )
  )
);