36409

Appears in sequences

• Expansion of e.g.f. cosh(sinh(x)*exp(x)).at n=8A009153
• a(1)=1, a(n) = n*4^(n-1) + a(n-1).at n=6A014916
• Fibonacci sequence beginning 5, 11.at n=18A022136
• a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = A023531, t = (Fibonacci numbers).at n=23A024318
• a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = A023531, t = (F(2), F(3), ...).at n=22A024322
• s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023531, t = (F(2), F(3), F(4), ...).at n=21A024885
• a(n) = ((3*n+1)*2^n - (-1)^n)/9.at n=13A045883
• Square array T(n,k) read by antidiagonals where T(0,k) = 0 and T(n,k) = 1 + 2k + 3k^2 + ... + n*k^(n-1).at n=70A059045
• Triangle read by rows, generated from (..., 3, 2, 1).at n=51A108283
• a(n) = 1 + 2*n + 3*n^2 + 4*n^3 + 5*n^4 + 6*n^5 + 7*n^6.at n=4A113532
• a(n) = 1681*n^2 - 984*n - 696.at n=4A118060
• Number of n X n binary matrices with no more than one 1 in any 3 X 3 sub-block.at n=7A140304
• Expansion of 1 / ( (1+x)*(2*x+1)*(-1+2*x)^2 ).at n=13A140787
• Values of register a when register b becomes 0 for the two-register machine {i[1], i[1], i[1], d[2,1], d[1,6], i[2], d[1,5], d[2,3]}.at n=22A156622
• Number of (n+2)X5 0..2 matrices with each 3X3 subblock idempotent.at n=15A224601
• Smallest positive integer solution x of 9*x - 2^n*y = 1.at n=16A234038
• a(0)=0, a(1)=1, a(n) = min{4 a(k) + (4^(n-k)-1)/3, k=0..(n-1)} for n>=2.at n=28A259665
• a(n) = k*Fibonacci(2*n+1) + (k+1)*Fibonacci(2*n), where k=5.at n=9A271359
• Number of multiples of n which have only distinct and nonzero digits in base 10.at n=42A328287
• Main diagonal of the extended Wythoff array (A287870).at n=16A367293