23656

Appears in sequences

• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite NES = NU-87 H4[Al4Si64O136].nH2O starting with a T2 atom.at n=13A019203
• McKay-Thompson series of class 28a for Monster.at n=35A058610
• Real part of absolute Gaussian perfect numbers, in order of increasing magnitude.at n=36A102531
• Number of permutations of length n which avoid the patterns 1234, 2431, 3421.at n=13A116834
• Numbers n such that 1 - Sum{k=1..n/2} A001223(2k-1)*(-1)^k = 0.at n=16A130643
• Numbers n such that 1 - S(n) = 0, where S(n) = (S(n-1) + A000040(n))*(-1)^n; S(0)=0, n=>1.at n=21A131197
• Number of 3-step one or two space at a time rook's tours on an n X n board summed over all starting positions.at n=21A187288
• Numbers k such that 2^k + 3^k + 6 is prime.at n=33A354829