1234568

Appears in sequences

• Triangle read by rows in which the n-th row contains the n numbers in increasing order formed by the concatenation of first n-1 numbers. (The digits of the numbers with 2 or more digits are taken as one entity.) First row is taken to be 0.at n=29A081539
• a(0)=0; a(1)=2. Slowest increasing sequence where every digit "d" has a copy of itself in a(n+d).at n=31A102150
• Concatenation of the numbers from 1 to n but omitting 7.at n=6A262577
• Concatenate the decimal numbers 1,2,3,...,n, then add 1.at n=6A359124