29646

Appears in sequences

• Bending a piece of wire of length n+1 (configurations that can only be brought into coincidence by turning the figure over are counted as different).at n=10A001444
• a(n) = 3^n*(3^n + 1)/2.at n=5A025551
• Number of reversible strings with n beads of 3 colors.at n=10A032120
• Triangular numbers whose index is a multiple of the sum of their digits.at n=40A067520
• a(n) = (n^10 + n^5)/2.at n=3A071236
• Triangular numbers whose sum of prime factors (with repetition) is also triangular.at n=23A076169
• Triangular numbers which are 7-almost primes.at n=15A076581
• Third row of Pascal-(1,6,1) array A081581.at n=35A081591
• a(n) = n! * Sum_{i+2j+3k=n} 1/(i!*(2j)!*(3k)!).at n=11A094717
• Numbers of the form prime(n) + prime(n+1) - 2 that are also triangular numbers, T(k) = k(k+1)/2.at n=23A110891
• Triangular numbers for which the sum of the digits is a cube.at n=10A117803
• Hexagonal numbers (A000384) which are sum of 2 other hexagonal numbers > 0.at n=24A133215
• Positive numbers of the form x^5-10x^3*y^2+5x*y^4 (where x,y are integers and y>x).at n=20A135792
• Numbers of the form x^5-10x^3*y^2+5x*y^4 (where x,y are integers).at n=27A135793
• Numbers of the form x^5 + 10*x^3*y^2 + 5*x*y^4 (where x,y are integers).at n=33A135794
• a(n) = m*(m+1)/2, where m = floor(n^(3/2)).at n=38A185541
• a(n) = m*(m+1)/2, where m = floor(n^(5/2)).at n=8A185542
• Numbers of the form (3^j + 9^k)/2, for j and k >= 0.at n=45A226793
• Number of n X 2 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two no more than once.at n=6A268622
• Number of nX7 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two no more than once.at n=1A268627