24795
domain: N
Appears in sequences
- Generalized Stirling numbers, [n+2,n]_2.at n=19A001701
- Octagonal pyramidal numbers: a(n) = n*(n+1)*(2*n-1)/2.at n=28A002414
- Numbers n such that phi((prime(n)+1)/2)=sigma(n).at n=38A068473
- a(n) = (n+1)*(2*n+1)*(4*n+1).at n=14A079588
- Semiperimeter of primitive Pythagorean triangles having legs that add up to a square, sorted on hypotenuse.at n=21A089549
- 63-gonal numbers: a(n) = n*(61*n - 59)/2.at n=29A098140
- Diagonal sums of a Krawtchouk triangle.at n=19A099038
- Structured icosidodecahedral numbers.at n=14A100147
- Number of reduced words of length n in Coxeter group on 30 generators S_i with relations (S_i)^2 = (S_i S_j)^3 = I.at n=3A162833
- Denominator of a-sequence for Sheffer triangle A060081.at n=56A176727
- Natural growth of an aliquot sequence driven by a perfect number 2^(p-1)*((2^p)-1), but starting at 11.at n=18A215778
- Odd octagonal pyramidal numbers.at n=14A218326
- Number of idempotent 3X3 -n..n matrices of rank 1.at n=12A221312
- The hyper-Wiener index of the Kneser graph K(n,2) (n>=5).at n=15A228307
- From higher-order Bernoulli numbers: denominator of D Number D2n(2n).at n=28A261274