23968

Appears in sequences

• Number of walks on cubic lattice.at n=11A005571
• Expansion of tanh(log(1+x)/cosh(x)).at n=8A009787
• exp(arcsinh(x)*sin(x))=1+2/2!*x^2+4/4!*x^4-40/6!*x^6-688/8!*x^8...at n=5A012596
• Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 17 (most significant digit on right).at n=7A061946
• a(1) = 3, a(2) = 4. a(n) = (largest composite which occurs earlier in sequence) + (largest prime which occurs earlier in sequence).at n=34A120365
• Numbers m such that m^2 + 3^k is prime for k = 1, 2, 3.at n=34A177173
• Number of (n+1)X(7+1) 0..2 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=7A237636
• E.g.f.: Series_Reversion( Sum_{n>=1} (-1)^(n-1) * x^(2*n-1)/(n*(n+1)/2) ) = Sum_{n>=1} a(n)*x^(2*n-1)/(2*n-1)!.at n=4A277414
• Number of integer-sided hexagons having perimeter n, modulo rotations but not reflections.at n=26A293823
• Number of partitions of n into 8 or more distinct parts.at n=44A347575