A323478 a(1)=1; thereafter, a(n) = string appended to (n-1)-st generation of A306211 to get the n-th generation.

1, 1, 2, 21, 221, 22121, 221212111, 221212111211113, 221212111211113211113141, 221212111211113211113141211113141141111, 22121211121111321111314121111314114111121111314114111114111214

Offset

1,3

Comments

The concatenation of these terms is the sequence A306211 itself.

The concatenation A323477(n-1) followed by a(n) is A323477(n). For example, if n=6, 11221221.22121 = 1122122122121.

The strings a(n) are converging to A323826, the RUNS transform of A306211.

Links

N. J. A. Sloane, Table of n, a(n) for n = 1..17

Crossrefs

Cf. A306211, A323477, A306215, A323475 (lengths), A323826 (limiting string).

Sequence in context: A364979 A137287 A155872 * A106412 A329497 A058476

Adjacent sequences: A323475 A323476 A323477 * A323479 A323480 A323481

Keyword

nonn,base

Author

N. J. A. Sloane, Jan 31 2019

Status

approved