Redirect Drupal node to WordPress ID?

I have just migrated a Drupal site to WordPress and I need to redirect the Drupal URLs to default WordPress URLs – ie, from URL format [domain]/node/XXX to [domain]/?p=XXX. It would seem a simple enough thing to do but I just can’t seem to get it to work. The code I’m using in HTACCESS is as follows:

<IfModule mod_rewrite.c>
Options +FollowSymlinks
RewriteEngine on

RewriteCond %{QUERY_STRING} ^q=node/(.+)$
RewriteCond %{REQUEST_URI} ^/node/(.+)$
RewriteRule ^(.*)$ https://www.bikesonshow.com/?p=%1 [R=301,L]

</IfModule>

I’ve tried to capture both possible Drupal URL formats. No idea why it won’t work. Any suggestions would be welcome.

Update: FYI I am seeing the following errors in my server error log:

[Sat Jul 02 02:20:12 2016] [alert] .../.htaccess: RewriteRule: cannot compile regular expression '^?q=node/(.*)', referer: https://www.bikesonshow.com/node/377