25944

Appears in sequences

• Seidel's triangle, read by rows.at n=44A014781
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 14.at n=23A031692
• Numbers k such that 233*2^k-1 is prime.at n=21A050868
• Smallest area of a Pythagorean triangle with n as length of one of the three sides.at n=44A054435
• Smallest area of a Pythagorean triangle with n as length of a leg.at n=44A054436
• a(n) = n*(n+1)*(2*n+1).at n=23A055112
• Largest area of a Pythagorean triangle with n as length of one of the three sides (in fact as a leg).at n=44A055522
• a(n) = p*(p + 1)*(2*p + 1) where p is the n-th prime.at n=8A098996
• Triangle read by rows: Each row is constructed by forming the partial sums of the previous row, reading from the right and at every other row repeating the final term.at n=44A099959
• Numbers k such that 2^k + k^2 + 1 is prime.at n=12A100357
• a(n) = 1728*n + 24.at n=14A157325
• a(n) = 529*n^2 + 23.at n=7A158631
• Triangle of coefficients of g.f. a*(1+x)^n + b*(1-x)^(n+2)*polylog(-n-1, x)/x + 2^n*c*(1-x)^(n+1)*LerchPhi(x, -n, 1/2), with a = -1, b = 1, c = 1.at n=24A168523
• a(n) = 49*n^2 + n.at n=22A173141
• Numbers k with the property that k^2 is a product of two distinct triangular numbers.at n=40A175497
• Area A of the cyclic quadrilaterals PQRS with PQ>=QR>=RS>=SP, such that A, the sides, the radius of the circumcircle and the two diagonals are integers.at n=37A219225
• Integer areas of integer-sided triangles where at least one of the three altitudes is of prime length.at n=24A256579
• The Genocchi triangle read by rows, T(n,k) for n>=0 and 0<=k<=n.at n=23A297703
• Indices of unique values in A329152.at n=29A333268