1213147

Appears in sequences

• Smallest multiple of n in which the most significant occurrence of the digit string of n is preceded and followed by the digit string of (n-1) and (n+1) as can be seen in the forward concatenation of the natural numbers.at n=12A078294
• Expansion of 1/((1-2*x)*(1+3*x)*(1-4*x)).at n=10A249994