16781313

Appears in sequences

• a(n) = 1^n + 2^n + 4^n.at n=12A001576
• a(n) = sigma_12(n), the sum of the 12th powers of the divisors of n.at n=3A013960
• Numerator of sum of -12th powers of divisors of n.at n=3A017687
• 9th cyclotomic polynomial evaluated at powers of 2.at n=4A020517
• Numbers k such that k^3 is palindromic in base 16.at n=15A029735
• Numbers whose cube is palindromic in base 8.at n=14A046239
• a(n) = n^6 + n^3 + 1.at n=16A060883
• Numbers of the form (4^{mr}-1)/(4^r-1) for positive integers m, r.at n=31A076275
• Numbers of the form (8^{mr}-1)/(8^r-1) for positive integers m, r.at n=18A076287
• Numbers such that the digital sums in base 2, base 4 and base 8 are all equal.at n=20A135124
• Numbers whose binary expansion has only the digit "1" as first, central and final digit.at n=12A135576
• Let a(1) = 1. Given a(1), ..., a(2^t), find the least k such that a(1) + 2^k, a(2) + 2^k, ..., a(2^t) + 2^k are all composite and a(1) + 2^k > a(2^t). Then a(2^t+i) = a(i) + 2^k for all 1 <= i <= 2^t.at n=20A173281
• Square array A(n,k), n >= 1, k >= 0, read by antidiagonals, where A(n,k) is Sum_{d|n} d^(k*n).at n=24A308569
• Numbers that are palindromic in bases 2, 4, and 8.at n=35A319584
• Numbers in base 10 that are palindromic in bases 2, 8, and 16.at n=18A319585
• Numbers in base 10 that are palindromic in bases 2, 4, 8, and 16.at n=11A319598
• Numbers in base 10 that are palindromic in bases 4, 8 and 16.at n=16A319609
• Sum of the 6th powers of the square divisors of n.at n=15A351311
• Sum of the 6th powers of the square divisors of n.at n=31A351311
• Sum of the 6th powers of the square divisors of n.at n=47A351311