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

0,13

Links

Table of n, a(n) for n=0..58.

Example

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.

Prog

(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

Crossrefs

Cf. A005150, A010785, A047842, A056966.

Sequence in context: A355223 A348179 A349422 * A321243 A067079 A080434

Adjacent sequences: A056964 A056965 A056966 * A056968 A056969 A056970

Keyword

base,easy,nonn

Author

Henry Bottomley, Jul 20 2000

Status

approved