A221369
A two-digit Look-and-Say sequence starting with 13: each term summarizes the increasing two-digit substrings of the previous term.
Original entry on oeis.org
13, 113, 111113, 411113, 311113141, 311113114231141, 511113214123331141142, 511112113314121123131132233241142151, 711312313214115321122223124331232233241142251, 411412213214115221522423224125431432233241142143151153171
Offset: 0
a(0) = 11: 1 x 13 --> a(1) = 113;
a(1) = 113: 1 x 11 and 1 x 13 --> a(2) = 111113;
a(2) = 111113: 4 x 11 and 1 x 13 --> a(3) = 411113;
a(3) = 411113: 3 x 11, 1 x 13 and 1 x 41 --> a(4) = 311113141.
A209233
A two-digit Look-and-Say sequence starting with 11: each term summarizes the increasing two-digit substrings of the previous term.
Original entry on oeis.org
11, 111, 211, 111121, 311112121, 311212221131, 211212113221222231, 211312113421422123131132, 311212413114421122123331132134242, 411412313114421122123224331132233134141342144, 411312413414321322323124431232233234441242143244
Offset: 0
a(0) = 11: 1 x 11 --> a(1) = 111;
a(1) = 111: 2 x 11 --> a(2) = 211;
a(2) = 211: 1 x 11 and 1 x 21 --> a(3) = 111121;
a(3) = 111121: 3 x 11, 1 x 12 and 1 x 21 --> a(4) = 311112121.
A209234
A two-digit Look-and-Say sequence starting with 10: each term summarizes the increasing two-digit substrings of the previous term.
Original entry on oeis.org
10, 110, 110111, 101110311, 101103210311131, 101203310311113121231132, 101203210411312213120121123431132133, 201103104210311512413220421122123331232133134141143, 101203204310411412313214115220421222223124431232333134341242143151
Offset: 0
a(0) = 10: 1x10 --> a(1)=110;
a(1) = 110: 1x10 and 1x11 --> a(2)=110111;
a(2) = 110111: 1x01, 1x10 and 3x11 -> a(3)=101110311;
a(3) = 101110311: 1x01, 1x03, 2x10, 3x11 and 1x31 -> a(4)=101103210311131.
A221368
A two-digit Look-and-Say sequence starting with 12: each term summarizes the increasing two-digit substrings of the previous term.
Original entry on oeis.org
12, 112, 111112, 411112, 311112141, 311112114121131141, 611212113214221231241, 211412113114421122123124131132141142161, 611412313414116621122123124331132341242144161, 411512213314216321122323224331132133234541142143144261162166
Offset: 0
a(0) = 12: 1 x 12 --> a(1) = 112;
a(1) = 112: 1 x 11 ana 1 x 12 --> a(2) = 111112;
a(2) = 111112: 4 x 11 and 1 x 12 --> a(4) = 411112;
a(3) = 411112: 3 x 11, 1 x 12 and 1 x 41 --> a(4) = 311112141.
A221372
A two-digit Look-and-Say sequence starting with 19: each term summarizes the increasing two-digit substrings of the previous term.
Original entry on oeis.org
19, 119, 111119, 411119, 311119141, 311114119131141191, 611113214219231241291, 311212113114119221123124129131132141142161191192, 911512313314116319521122123124129431132341142161291292
Offset: 0
a(0) = 19: 1 x 19 --> a(1) = 119;
a(1) = 119: 1 x 11 and 1 x 19 --> a(2) = 111119;
a(2) = 111119: 4 x 11 and 1 x 19 --> a(3) = 411119;
a(3) = 411119: 3 x 11, 1 x 19 and 1 x 41 --> a(4) = 311119141.
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