67600

Appears in sequences

• Generalized Stirling numbers, [n+2,n]_2.at n=25A001701
• a(n) = n*(n+1)*(n+2)^2/6.at n=24A004320
• a(n) = (8*n + 4)^2.at n=32A017114
• a(n) = (9*n + 8)^2.at n=28A017258
• a(n) = (10*n)^2.at n=26A017270
• a(n) = (11*n + 7)^2.at n=23A017474
• a(n) = (12*n + 8)^2.at n=21A017618
• Smallest nontrivial extension of n^2 which is a square.at n=25A030686
• Squares with initial digit '6'.at n=24A045789
• Squares the sum of the squares of whose digits are squares.at n=17A061090
• Squares whose reversal is also a square.at n=36A061457
• Numbers n such that n and its 10's complement are both squares, i.e., n and 10^k - n (where k is the number of digits in n) are squares.at n=13A068810
• k^2 is a term if k^2 + (k-1)^2 and k^2 + (k+1)^2 are primes.at n=11A075577
• Numbers n that are the hypotenuse of exactly 12 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 12 ways.at n=25A097226
• Squares of second pentagonal numbers: a(n) = (1/4)*n^2*(3*n+1)^2.at n=13A100256
• Bisection of A000125.at n=37A100503
• Numbers n with property that both n and its digit reversal are perfect powers (i.e., in A001597).at n=40A118895
• Nonnegative integers c such that there are nonnegative integers a and b that satisfy a^(1/2) + b^(1/2) = c^(1/2) and a^2 + b = c.at n=8A135509
• Non-palindromic squares whose digit reversal gives a square (possibly with fewer digits).at n=24A161902
• Totally multiplicative sequence with a(p) = 7p-1 for prime p.at n=35A166656