24396

Appears in sequences

• Number of symmetric foldings of a strip of n blank stamps.at n=21A001010
• 4-dimensional analog of centered polygonal numbers.at n=17A006322
• a(n) = n^3 + 7.at n=29A084377
• Number of (s(0), s(1), ..., s(2n+1)) such that 0 < s(i) < 9 and |s(i) - s(i-1)| = 1 for i = 1,2,...,2n+1, s(0) = 1, s(2n+1) = 4.at n=8A094827
• Indices of primes in sequence defined by A(0) = 89, A(n) = 10*A(n-1) - 61 for n > 0.at n=10A101064
• Triangle read by rows: T(n,k) is number of paths from (0,0) to (3n,0) that stay in the first quadrant (but may touch the horizontal axis), consisting of steps u=(2,1), U=(1,2), or d=(1,-1) and having abscissa of first return equal to 3k.at n=22A108439
• Numbers such that the sum of the factorials of the digits of the fourth power is a square.at n=34A126077
• Expansion of (x^2)/[(1-x)*(1-3*x^2-x^3)].at n=18A188021
• Number of identity trees with n nodes where the maximal outdegree (branching factor) equals 10.at n=4A245755
• 27-gonal pyramidal numbers: a(n) = n*(n+1)*(25*n-22)/6.at n=18A256647
• The number of imprimitive 3-Carmichael numbers (A087788 and A328935) below 10^n.at n=12A328937
• a(n) = A080247(2*n, n), the central values of the Big-Schröder triangle.at n=5A330801
• Sum_{n>=0} a(n) * x^n / (n!)^2 = exp(1 / BesselJ(0,2*sqrt(x)) - 1).at n=5A336609