112112

Appears in sequences

• Describe previous term from the right (method B - initial term is 2).at n=3A022488
• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,1,2.at n=5A037535
• Sum of digits of zero-absent composite a(n) equals number of prime factors.at n=8A050690
• Array in which the n-th row contains the multiples of n using nonzero digits and having a digit sum of n. Sequence contains the rows and a zero entry for rows with no terms (e.g. 10).at n=40A077755
• LookAndSay(n) is palindromic.at n=18A079676
• Sorted list of strings that can be obtained by starting with 12 and repeatedly doubling any substring in place.at n=19A130838
• Minimal covering numbers.at n=48A160559
• 6-digit numbers k such that: (a) the digits of k are from the set {1, 2, 3, 4, 5}, and (b) any digit that appears in k appears at least twice.at n=17A171725
• Triangle T(n,k) = binomial(n,k)*binomial(n+k+1,n+1) read by rows, 0 <= k <= n.at n=41A178301
• Composite numbers whose product of digits is 4.at n=34A201016
• List of imprimitive words over the alphabet {1,2}.at n=11A213972
• List of subwords of A003842 arranged in lexicographic order.at n=20A213975
• Product of the radicals of the integers less than n and relatively prime to n.at n=14A220271
• List of prefix-normal words over the alphabet {1,2}.at n=40A238109
• Non-primitive words on {1,2,3}.at n=19A239018
• a(n) = 6*(n+1)!/((3+floor(n/2))*(floor(n/2)!)^2).at n=13A242986
• 4n concatenated with itself.at n=27A248365
• Positive numbers n such that (digitsum(n))^2 equals (product of digits(n))^3.at n=9A261778
• List of words of length n over an alphabet of size 9 that are in standard order and which have the property that every letter that appears in the word is repeated.at n=22A273978
• Consider the Post tag system described in A284116 (but adapted to the alphabet {1,2}) ; sequence lists the words that terminate in the empty word.at n=37A289675