20564

Appears in sequences

• Numbers k such that k*(k+2) is a palindrome.at n=19A028503
• Sums of 5 distinct powers of 4.at n=39A038473
• XOR difference triangle, read by rows, of A099898 (in leftmost column) such that the main diagonal equals A099898 shift left and divided by 4.at n=28A099897
• Shifts left and divides by 4 under the XOR BINOMIAL transform (A099899).at n=7A099898
• A106486-encodings of combinatorial games with value 2.at n=30A125995
• Triangle read by rows: expansion of p(x,n)=If[n == 0, 1, (x + 1)^n + 2^(n+1)*Sum[Binomial[n-m, m]*x^m*(1 + x^(n - 2*m)), {m, 1, n - 1}]].at n=48A146774
• Triangle read by rows: expansion of p(x,n)=If[n == 0, 1, (x + 1)^n + 2^(n+1)*Sum[Binomial[n-m, m]*x^m*(1 + x^(n - 2*m)), {m, 1, n - 1}]].at n=51A146774
• Number of Goldbach partitions of (2n)^n.at n=5A180041
• Number of (n+1) X (2+1) 0..3 arrays with every 2 X 2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 10.at n=3A233961
• Number of (n+1) X (4+1) 0..3 arrays with every 2 X 2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 10.at n=1A233963
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 10 (10 maximizes T(1,1)).at n=11A233967
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 10 (10 maximizes T(1,1)).at n=13A233967
• Number of compositions of n into distinct parts with exactly three descents.at n=21A241722
• Rhonda numbers in sexagesimal number system.at n=8A255731
• Number of integer compositions of n that are weakly alternating and have at least two adjacent equal parts.at n=18A349800