Push button counter from 0-999, but increment in 1, 4 and 6
A pulse doubler will get you two pulses out per one pulse in.



The pulse frequency doubler consists of two gates of the NAND CD4011, and one of the gates forms the phase inverter. By inputting the falling edge inverting phase of the pulse, the circuit will output a pulse with the help of the rising edge and the falling edge of the pulse, so that the aim of double frequency is fulfilled. Source: SeekIC.com.

Since this is running on a CMOS chip you need a pull-up on the input so that it isn't floating.

I'll leave you to figure out how to quadruple a pulse. There are a few catches!