25665

Appears in sequences

• Orders of non-cyclic simple groups (divided by 4).at n=30A008976
• Least k such that the first k terms of the Kolakoski sequence (A000002) contain n more 2's than 1's.at n=16A025503
• Denominator of |Bernoulli(2n+2)| - |Bernoulli(2n)|.at n=28A029765
• a(n) is both the sum of n+1 consecutive integers and the sum of the n immediately higher consecutive integers.at n=29A059270
• Numbers k such that k and k^2 use only the digits 2, 5, 6, 8 and 9.at n=6A137114
• Number of binary strings of length n with no substrings equal to 0001 0011 or 1011.at n=24A164458
• Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock equal.at n=4A237474
• Number of (n+1)X(5+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock equal.at n=0A237478
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock equal.at n=10A237481
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock equal.at n=14A237481
• Number of n X 2 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=30A241050
• Position of first appearance of each integer in A088568 (number of 1's minus number of 2's in first n terms of A000002).at n=28A288605
• a(n) = index where A088568 (or equally A294448) first reaches or exceeds n in magnitude.at n=16A294449
• a(n) = 1 + (a(n-1) interpreted as a hexadecimal number); a(1)=1.at n=20A347295
• Expansion of (1/x) * Series_Reversion( x / ((1+x)^3 - x^2) ).at n=7A371428
• Composite squarefree integers for which the sum of the squares of their factors is a square.at n=16A379780