36244

Appears in sequences

• a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1 and a(2) = a(3) = 3.at n=15A049974
• Alternate terms of A001263 as polynomials divided by x+1 to give a new triangle of coefficients of even powered polynomials.at n=30A136267
• Expansion of (1-sqrt(1-4*x))/(2*x) + 8*x^3/((sqrt(1-4*x))*(1+sqrt(1-4*x))^3).at n=10A141771
• Engel expansion of tan(1/2).at n=6A161559
• Number of (n+2)X5 binary matrices with every 3X3 block having exactly four 1's.at n=5A181257
• Number of (n+2)X8 binary matrices with every 3X3 block having exactly four 1's.at n=2A181260
• T(n,k) = number of (n+2) X (k+2) binary matrices with every 3 X 3 block having exactly four 1's.at n=30A181262
• T(n,k) = number of (n+2) X (k+2) binary matrices with every 3 X 3 block having exactly four 1's.at n=33A181262
• 1-sequence of reduction of the lower Wythoff sequence by x^2 -> x+1.at n=15A192301
• Sum of divisors of n and product of divisors of n are both perfect cubes.at n=9A244428
• Number of decagons that can be formed with perimeter n.at n=46A288256
• Two-column table read by rows: Primitive distinct pairs that have the same value of phi, sigma, and tau.at n=45A322688
• a(n) is the number of lattice paths from (0,0) to (2n,2n) using only the steps (1,0) and (0,1) and which do not touch any other points of the form (2k,2k).at n=5A337350