25974

Appears in sequences

• Appending a digit to n^2 gives another perfect square.at n=20A031150
• Number of partitions satisfying cn(2,5) + cn(3,5) < cn(1,5) + cn(4,5).at n=40A039893
• Numbers k such that 10*k^2 + 9 is a square.at n=9A075836
• a(n) = n*(n - 1)*(n + 2)/2.at n=36A077414
• L-th order palindromes with L > 2.at n=21A089381
• Numerators of convergents to 3/(1 + sqrt(10)).at n=17A093611
• Expansion of -x*(x+1)^2*(x^8-2*x^7+2*x^6-3*x^5+3*x^4+2*x^2-x+1) / (x^12+6*x^6-1).at n=33A121795
• Expansion of -x*(x+1)^2*(x^8-2*x^7+2*x^6-3*x^5+3*x^4+2*x^2-x+1) / (x^12+6*x^6-1).at n=35A121795
• Numbers n = concat(a,b) such that phi(n) = phi(a) * phi(b), where phi = A000010.at n=35A147619
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 0), (0, 1), (1, 1)}.at n=9A151282
• a(n) is the smallest positive number such that a(n)*n is an anagram of a(n)*4.at n=14A175693
• a(n) is the smallest positive number such that a(n)*n is an anagram of a(n)*4.at n=36A175693
• Numerators in convergents to infinitely repeating period 3 palindromic continued fraction [1,2,1,...].at n=17A179238
• Numbers n with property that (n+1)*prime(n+1)-n*prime(n) is a perfect square s^2.at n=39A181283
• a(n) = 6*a(n-2) + a(n-4), where a(0) = 3, a(1) = 11, a(2) = 18, a(3) = 68.at n=10A228470
• Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=3A237457
• Number of (n+1)X(4+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=1A237459
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=11A237463
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=13A237463
• 37-gonal numbers: a(n) = n*(35*n-33)/2.at n=39A282852