>>645 javascript
const seqSqArr = n => Array.from({length: n}).map((v, i) => Array.from({length: n}, (v, j) => n * i + j + 1));
console.log(seqSqArr(3));
//=> [[1,2,3],[4,5,6],[7,8,9]]
console.log(seqSqArr(7));
//=> [[1,2,3,4,5,6,7],[8,9,10,11,12,13,14],[15,16,17,18,19,20,21],[22,23,24,25,26,27,28],[29,30,31,32,33,34,35],[36,37,38,39,40,41,42],[43,44,45,46,47,48,49]]
const seqSqArr = n => Array.from({length: n}).map((v, i) => Array.from({length: n}, (v, j) => n * i + j + 1));
console.log(seqSqArr(3));
//=> [[1,2,3],[4,5,6],[7,8,9]]
console.log(seqSqArr(7));
//=> [[1,2,3,4,5,6,7],[8,9,10,11,12,13,14],[15,16,17,18,19,20,21],[22,23,24,25,26,27,28],[29,30,31,32,33,34,35],[36,37,38,39,40,41,42],[43,44,45,46,47,48,49]]
