22525

Appears in sequences

• Numbers that are the sum of 2 nonzero squares in exactly 6 ways.at n=15A025289
• Numbers that are the sum of 2 nonzero squares in 5 or more ways.at n=22A025296
• Numbers that are the sum of 2 nonzero squares in 6 or more ways.at n=15A025297
• Numbers that are the sum of 2 distinct nonzero squares in exactly 6 ways.at n=15A025307
• Numbers that are the sum of 2 distinct nonzero squares in 5 or more ways.at n=20A025315
• Numbers that are the sum of 2 distinct nonzero squares in 6 or more ways.at n=15A025316
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 12.at n=25A031690
• Numbers whose base-4 representation contains exactly four 1's and four 3's.at n=4A045133
• Numbers using only the digits 2 and 5, that are both curved and straight.at n=35A072961
• Numbers m that are the hypotenuse of exactly 22 distinct integer-sided right triangles, i.e., m^2 can be written as a sum of two squares in 22 ways.at n=15A097103
• Structured triakis tetrahedral numbers (vertex structure 4).at n=24A100175
• Lexicographically earliest sequence of increasing numbers whose digits satisfy the "Fractal Jump" rule using only the digits 2 and 5: keep the first digit "d" of the sequence, then jump over the next "d" digits and keep the digit "e" on which you have landed. Jump now over the next "e" digits and keep the digit "f" on which you have landed, etc. The succession "def..." of kept digits is the sequence itself.at n=17A105647
• a(n) = 2*a(n-1)+3 with n>1, a(1)=8.at n=11A156198
• a(n) = 36*n^2 + n.at n=24A157324
• a(n) = 625*n^2 + 25.at n=5A157915
• Number of (n+2) X 4 binary arrays avoiding patterns 000 and 101 in rows, columns and nw-to-se diagonals.at n=6A202526
• Number of (n+2) X 9 binary arrays avoiding patterns 000 and 101 in rows, columns and nw-to-se diagonals.at n=1A202531
• T(n,k) = Number of (n+2) X (k+2) binary arrays avoiding patterns 000 and 101 in rows, columns and nw-to-se diagonals.at n=29A202532
• T(n,k) = Number of (n+2) X (k+2) binary arrays avoiding patterns 000 and 101 in rows, columns and nw-to-se diagonals.at n=34A202532
• a(n) = n-th pi-based antiderivative of 7.at n=17A259168