25312

Appears in sequences

• Numbers that, when expressed in base 4 and then interpreted in base 10, yield a multiple of the original number.at n=39A032540
• Convolution of nonzero squares A000290 with themselves.at n=13A033455
• a(n) in base 15 is a repdigit.at n=49A048339
• A convolution triangle of numbers obtained from A025749.at n=16A049213
• Values of z arising from representations of -n in A102535.at n=25A102809
• a(n) = 2 + (89040 + (71868 + (29932 + (8449 + (1960 + (322 + (28 + n)*n)*n)*n)*n)*n)*n)*n/40320.at n=10A145130
• Triangle T(n,m) read by rows: let p(n,x) = exp(-x) * Sum_{m >= 0} (2*m + 1)^n * x^m/m!; then T(n,m) = [x^m] p(n,x).at n=33A154537
• Number of compositions of odd natural numbers into 4 parts <= n.at n=14A191903
• Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=6A316417
• Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=4A316419
• a(n) is the smallest integer k such that Omega(k) = n and Omega(2*k+1) = n+1 (where Omega is A001222).at n=6A330089
• a(n) = Sum_{k=1..n-1} sigma(k) * sigma_2(n-k).at n=19A374974
• Triangle read by rows T(n,k) is the number of diamond coverings for a specific number of diamonds covering an odd length row of triangles.at n=72A381552