121381

Appears in sequences

• Take the first n numbers written in base 5, concatenate them, then convert from base 5 to base 10.at n=5A048437
• The first n digits of the juxtaposition of the base-5 numbers converted to decimal.at n=7A055146
• Number of distinct coefficients in expansion related to enumeration of permutations of length n by length of longest subsequence.at n=24A068604
• Sieve performed by successive iterations of steps where step m is: keep m terms, remove the next 3 and repeat; as m = 1,2,3,.. the remaining terms form this sequence.at n=30A112561
• y value of the local maximum of a discrete plot of the result of concatenating the integers one to n in base x.at n=4A175916
• a(0)=0, a(n+1) is the least k>a(n) such that k+a(n)+n+1 is a Fibonacci number.at n=24A215006
• Number of (n+2)X(3+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.at n=7A255086