21025

Appears in sequences

• Crystal ball sequence for D_4 lattice.at n=8A007204
• Squares of odd pentagonal numbers.at n=5A014769
• a(0)=1, a(1)=12, a(n) = sum_{k=0}^{k=n-1} 12^k a(k).at n=3A015501
• a(n) = (4*n + 1)^2.at n=36A016814
• a(n) = (5*n)^2.at n=29A016850
• a(n) = (6*n + 1)^2.at n=24A016922
• a(n) = (7*n + 5)^2.at n=20A017042
• a(n) = (8*n + 1)^2.at n=18A017078
• a(n) = (9*n + 1)^2.at n=16A017174
• a(n) = (10*n + 5)^2.at n=14A017330
• a(n) = (11*n + 2)^2.at n=13A017414
• a(n) = (12*n + 1)^2.at n=12A017534
• Numbers whose square is palindromic in base 12.at n=25A029737
• Palindromic squares in base 12.at n=6A029738
• Decimal part of cube root of a(n) starts with 6: first term of runs.at n=25A034132
• Squares with initial digit '2'.at n=17A045785
• a(1)=9; if n = Product p_i^e_i, n > 1, then a(n) = Product p_{i+2}^{e_i+1}.at n=37A045972
• Numbers k such that the sum of cubes of divisors of k and the sum of 4th powers of divisors of k are relatively prime.at n=42A046685
• Squares with at least one of the decimal expansion digits occurring separated.at n=33A052082
• Squares having last digit equal to the sum of the other digits.at n=6A054259