211100

Appears in sequences

• Successive positions in Tower of Hanoi (with three pegs {0,1,2}) where xyz means smallest disk is on peg z, second smallest is on peg y, third smallest on peg x, etc. and leading zeros indicate largest disks are all on peg 0.at n=35A055662
• Triangle T, read by rows, such that the matrix inverse satisfies: [T^-1](n,k) = -(k+1)*T(n-1,0) for n>k>=0, with T(n,n)=1 for n>=0.at n=37A112911
• Column 1 of triangle A112911.at n=7A112912
• Mutually-praising pairs excluding autobiographical numbers A046043. Version 1: both numbers in a pair have at most 10 digits.at n=14A138481
• Mutually-praising pairs excluding autobiographical numbers A138480. Version 2: numbers may have more than 10 digits.at n=19A138482
• Numbers n such that sum of decimal digits of n equals number of prime divisors of n counted with multiplicity and sum of distinct decimal digits of n equals number of distinct primes dividing n.at n=23A280911
• Ternary numbers consisting of a run of 2's, then a run of 1's, then a run of 0's.at n=12A371053
• Ternary numbers that are concatenated runs C(1)A(1)B(1)C(2)A(2)B(2)...C(k)A(k)B(k), where A(i) is a run of 1's, B(i) a run of 0's, and C(i) a run of 2's, for i = 1..k.at n=13A371111