33489

Appears in sequences

• Numbers k that divide s(k), where s(1)=1, s(j)=13*s(j-1)+j.at n=34A014861
• Numbers k such that k divides s(k), where s(1)=1, s(j) = s(j-1) + j*13^(j-1).at n=16A014953
• a(n) = (5*n + 3)^2.at n=36A016886
• a(n) = (6*n+3)^2.at n=30A016946
• a(n) = (7*n + 1)^2.at n=26A016994
• a(n) = (8*n + 7)^2.at n=22A017150
• a(n) = (9*n + 3)^2.at n=20A017198
• a(n) = (10*n + 3)^2.at n=18A017306
• a(n) = (11*n + 7)^2.at n=16A017474
• a(n) = (12*n + 3)^2.at n=15A017558
• Squares with digits in nondecreasing order.at n=24A028820
• Squares which are palindromes in base 13.at n=7A029999
• Odd refactorable numbers.at n=21A036896
• Square refactorable numbers.at n=29A036907
• Squares with initial digit '3'.at n=21A045786
• a(n) = n^4 - 2*n^3 + 3*n^2 - 2*n + 1, the Alexander polynomial for reef and granny knots.at n=14A058031
• a(1) = 1; a(n) is smallest square > a(n-1) such that a(n) + a(n-1) is a prime.at n=34A062067
• Composite numbers k+1 such that k*phi(k+1) is a perfect square.at n=28A069068
• Squares of odd semiprimes A046315, odd numbers divisible by exactly 2 primes (counted with multiplicity).at n=34A075730
• Numbers k having exactly one divisor d such that in binary representation d and k/d have the same number of 1's as k.at n=11A080026