A138486
Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 2.
Original entry on oeis.org
2, 12, 1211, 3112, 122113, 133122, 222123, 134211, 31121413, 23411412, 22312413, 23211432, 32231421, 21321423, 23321421, 21321423, 23321421, 21321423, 23321421, 21321423, 23321421, 21321423, 23321421, 21321423
Offset: 0
To get the term after 122113, we say: one 3's, three 1's, two 2's, so 133122
Cf.
A063850,
A022482,
A005150,
A005151,
A006751,
A006715,
A006711,
A022506-
A022513,
A138484,
A138485,
A138487-
A138493.
A138487
Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 3.
Original entry on oeis.org
3, 13, 1311, 3113, 2321, 112213, 133122, 222123, 134211, 31121413, 23411412, 22312413, 23211432, 32231421, 21321423, 23321421, 21321423, 23321421, 21321423, 23321421, 21321423, 23321421, 21321423, 23321421, 21321423
Offset: 0
To get the term after 112213, we say: one 3's, three 1's, two 2's, so 133122
A138488
Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 4.
Original entry on oeis.org
4, 14, 1411, 3114, 142113, 13311214, 14411223, 13223124, 14322123, 23322114, 14213223, 23322114
Offset: 0
To get the term after 142113, we say: one 3's, three 1's, one 2's, one 4's, so 13311214
A138489
Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 5.
Original entry on oeis.org
5, 15, 1511, 3115, 152113, 13311215, 15411223, 1322311415, 1541142322, 3213243115, 1531331422, 2214313315, 1531331422, 2214313315, 1531331422, 2214313315, 1531331422, 2214313315, 1531331422, 2214313315, 1531331422
Offset: 0
To get the term after 152113, we say: one 3's, three 1's, one 2's, one 5's, so 13311215
A138490
Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 6.
Original entry on oeis.org
6, 16, 1611, 3116, 162113, 13311216, 16411223, 1322311416, 1641142322, 3213243116, 1631331422, 2214313316, 1631331422, 2214313316, 1631331422, 2214313316, 1631331422, 2214313316, 1631331422, 2214313316, 1631331422
Offset: 0
To get the term after 162113, we say: one 3's, three 1's, one 2's, one 6's, so 13311216
A138491
Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 7.
Original entry on oeis.org
7, 17, 1711, 3117, 172113, 13311217, 17411223, 1322311417, 1741142322, 3213243117, 1731331422, 2214313317, 1731331422, 2214313317, 1731331422, 2214313317, 1731331422, 2214313317, 1731331422, 2214313317, 1731331422
Offset: 0
To get the term after 172113, we say: one 3's, three 1's, one 2's, one 7's, so 13311217
Cf.
A063850,
A022482,
A005150,
A005151,
A006751,
A006715,
A006711,
A022506-
A022513,
A138484-
A138490,
A138492,
A138493.
A138492
Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 8.
Original entry on oeis.org
8, 18, 1811, 3118, 182113, 13311218, 18411223, 1322311418, 1841142322, 3213243118, 1831331422, 2214313318, 1831331422, 2214313318, 1831331422, 2214313318, 1831331422, 2214313318, 1831331422, 2214313318, 1831331422
Offset: 0
To get the term after 182113, we say: one 3's, three 1's, one 2's, one 8's, so 13311218
A022509
Describe previous term from the right (method A - initial term is 5).
Original entry on oeis.org
5, 15, 1511, 211511, 21152112, 122112152112, 122112151112212211, 2122112231151112212211, 21221122311521132221221112, 12312211321321121521132221221112
Offset: 0
The term after 1511 is obtained by saying "two 1's, one 5, one 1", which gives 211511.
A022510
Describe previous term from the right (method A - initial term is 6).
Original entry on oeis.org
6, 16, 1611, 211611, 21162112, 122112162112, 122112161112212211, 2122112231161112212211, 21221122311621132221221112, 12312211321321121621132221221112
Offset: 0
E.g., the term after 1611 is obtained by saying "two 1's, one 6, one 1", which gives 211611.
-
a[1]=6; a[n_]:= a[n]= IntegerReverse[ FromDigits[ Flatten[ Replace[ Replace[ Replace[ Split[ IntegerDigits[a[n-1]]], {x_,y_}->{x,Length[{x,y}]},{1}], {x_,y_,z_}->{x,Length[{x,y,z}]},{1}], {x_}->{x,Length[{x}]},{1}]]]];
Array[a,10] (* Ivan N. Ianakiev, Jul 23 2019 *)
-
from re import split
A022510_list, l = [6], '6'
for _ in range(10):
l = ''.join(str(len(d))+d[0] for d in split('(0+|1+|2+|3+|4+|5+|6+|7+|8+|9+)',l[::-1]) if d)
A022510_list.append(int(l)) # Chai Wah Wu, Jan 02 2015
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