A082242 Multiples of 4 that are the concatenation of 4 consecutive natural numbers.

3456, 9101112, 13141516, 17181920, 21222324, 25262728, 29303132, 33343536, 37383940, 41424344, 45464748, 49505152, 53545556, 57585960, 61626364, 65666768, 69707172, 73747576, 77787980, 81828384, 85868788, 89909192, 93949596, 979899100, 101102103104

Offset

1,1

Comments

Except for the first term all the other terms are a concatenation of 4 numbers from 4k+1 to 4k+4. All the natural numbers are used except 1,2,7 and 8.

Links

Table of n, a(n) for n=1..25.

Mathematica

Select[FromDigits[Flatten[IntegerDigits[#]]]&/@Partition[Range[100], 4, 1], Mod[#, 4]==0&] (* Harvey P. Dale, Jun 16 2023 *)

Crossrefs

Cf. A082243.

Sequence in context: A179705 A234893 A251485 * A321866 A235835 A235830

Adjacent sequences: A082239 A082240 A082241 * A082243 A082244 A082245

Keyword

base,easy,nonn

Author

Amarnath Murthy, Apr 11 2003

Extensions

More terms from Harvey P. Dale, Jun 16 2023

Status

approved