A056967 Write what is described (putting a leading zero on numbers which have an odd number of digits).
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 11, 22, 33, 44, 55, 66, 77, 88, 99, 0, 111, 222, 333, 444, 555, 666, 777, 888, 999, 0, 1111, 2222, 3333, 4444, 5555, 6666, 7777, 8888, 9999, 0, 11111, 22222, 33333, 44444, 55555, 66666, 77777, 88888
Offset: 0
Examples
a(123130415)=3335 since it should be read as 01.23.13.04.15, i.e., zero 1's followed by two 3's followed by one 3 followed by zero 4's followed by one 5.
Programs
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Python
def A056967(n): s = str(n) s = '0'*(len(s)&1)+s return int('0'+''.join(s[i+1]*int(s[i])for i in range(0,len(s),2))) # Chai Wah Wu, Feb 12 2023