Андрей Лысов

var array_eq = [],
    nameLength = document.getElementsByClassName("name_eq").length;
for (var i = 0; i < nameLength; i++) {
    var value = document.getElementsByClassName("name_eq")[i].value;
    array_eq.push([value]);
}

for (var i = 0; i < array_eq.length; i++) {
    var num_arr = array_eq[i][0];
    var name_ar = '[name = sn' + num_arr + ']';
    array_eq[i].push($(name_ar).val());

}
console.log(array_eq);