A253677 Product of decimal digits of n-th term of the Look and Say sequence A005150.

1, 1, 2, 2, 4, 12, 24, 36, 216, 1296, 62208, 746496, 107495424, 46438023168, 240734712102912, 8423789045905096704, 5589622068988418728132608, 133524176512370516060034538930176, 581306137722148449693374999786222908342272

Offset

1,3

Links

Alois P. Heinz, Table of n, a(n) for n = 1..30

Eric Weisstein's World of Mathematics, Look and Say Sequence

Wikipedia, Look-and-Say sequence

Formula

a(n) = A007954(A005150(n)).

Example

a(5) = A007954(A005150(5)) = A007954(111221) = 4.

Crossrefs

Cf. A004977, A007954.

Sequence in context: A002840 A355566 A298477 * A182894 A286410 A285611

Adjacent sequences: A253674 A253675 A253676 * A253678 A253679 A253680

Keyword

nonn,base,changed

Author

Fabian Nedic, Jan 08 2015

Status

approved