39321

Appears in sequences

• Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 2,1.at n=7A037489
• List of codewords in binary lexicode with Hamming distance 8 written as decimal numbers.at n=19A075940
• a(n) = n^3 + 17.at n=34A084379
• Smallest GF2X-Matula number i which encodes a tree of n nodes, i.e., for which A091238(i) = n.at n=29A091239
• Number of fib100 primes (A095088) in range ]2^n,2^(n+1)].at n=21A095068
• a(n) = n*(n+1)*(n^2-2*n+2)/2.at n=17A101375
• a(n) = 8*n^3 + n.at n=17A118465
• a(n) = 2*n^3 - 2*n + 9.at n=26A127989
• Positive integers n that are palindromic in base 2 and whose binary representation has the same number of 0's as 1's.at n=21A143905
• Positive integers that are palindromes (of even length) in binary, each made by concatenating two identical binary palindromes.at n=23A161400
• Binary XOR of 2^k - (-1)^k as k varies from 1 to n.at n=14A199402
• Rows of negated binary Walsh matrices interpreted as reverse binary numbers.at n=18A228540
• Number of n X 3 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or vertically.at n=3A232363
• Number of n X 4 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or vertically.at n=2A232364
• T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or vertically.at n=17A232368
• T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or vertically.at n=18A232368
• Decimal representation of the middle column of the "Rule 147" elementary cellular automaton starting with a single ON (black) cell.at n=15A262864
• a(n) = (1/n)*Sum_{k=0..n-1} (8*k + 9)*A295112(k)^2.at n=6A295113
• Numbers n such that uphi(n) (the unitary totient function A047994) is a power of the number of unitary divisors of n (A034444).at n=18A303435
• Expansion of Sum_{k>=0} x^(k*(k+1)) / Product_{j=1..k} (1 - j*x^j).at n=33A306663