21202

Appears in sequences

• Fibonacci numbers written in base 4.at n=15A004687
• Number of permutations of length n with 2 cycle lengths.at n=5A005772
• Integer part of ((4th elementary symmetric function of 2,3,...,n+4)/(2nd elementary symmetric function of 2,3,...,n+4)).at n=28A024181
• n written in fractional base 3/2.at n=20A024629
• Number of n-move bishop paths on 8x8 board from given corner to opposite corner.at n=6A025594
• List of codewords in binary lexicode with Hamming distance 7 written as decimal numbers.at n=21A075937
• Binary numbers with 2 replacing 1 in odd positions.at n=29A095914
• Bell(n-1) + Fibonacci(n).at n=10A100396
• Ternary emirpimes.at n=18A119684
• Numbers k such that 3^k + 3^4 + 1 is prime.at n=22A168170
• Quartan semiprimes: semiprimes of the form x^4 + y^4, x>0, y>0.at n=16A182277
• Numbers 3*n + 2 written in base 3.at n=69A190642
• a(n) = 13*n^2 - 16*n + 5.at n=41A202141
• Triangular array read by rows: T(n,k) is the number of n-permutations that have exactly k distinct cycle lengths.at n=15A218868
• Numbers that require three steps to collapse to a single digit in base 4 (written in base 4).at n=13A253953
• The index of the first of two consecutive positive triangular numbers (A000217) the sum of which is equal to the sum of thirteen consecutive positive triangular numbers.at n=6A262492
• Numbers with digits in {0,1,2} such that every other digit is strictly less than its neighbors.at n=30A306105
• Sums of two distinct odd fourth powers.at n=14A342832
• Sums of two odd fourth powers.at n=19A343588
• Representation of n in rational base 3/2.at n=10A383346